diff --git a/spec/ameba/formatter/disabled_formatter_spec.cr b/spec/ameba/formatter/disabled_formatter_spec.cr
index 052d336c..c44f1a50 100644
--- a/spec/ameba/formatter/disabled_formatter_spec.cr
+++ b/spec/ameba/formatter/disabled_formatter_spec.cr
@@ -16,8 +16,8 @@ module Ameba::Formatter
 
         path = "source.cr"
         s = Source.new("", path).tap do |source|
-          source.error(ErrorRule.new, 1, 2, "ErrorRule", :disabled)
-          source.error(NamedRule.new, 2, 2, "NamedRule", :disabled)
+          source.add_issue(ErrorRule.new, {1, 2}, message: "ErrorRule", status: :disabled)
+          source.add_issue(NamedRule.new, location: {2, 2}, message: "NamedRule", status: :disabled)
         end
         subject.finished [s]
         log = output.to_s
@@ -30,8 +30,9 @@ module Ameba::Formatter
 
       it "does not write not-disabled rules" do
         s = Source.new("", "source.cr").tap do |source|
-          source.error(ErrorRule.new, 1, 2, "ErrorRule")
-          source.error(NamedRule.new, 2, 2, "NamedRule", :disabled)
+          source.add_issue(ErrorRule.new, {1, 2}, "ErrorRule")
+          source.add_issue(NamedRule.new, location: {2, 2},
+            message: "NamedRule", status: :disabled)
         end
         subject.finished [s]
         output.to_s.should_not contain ErrorRule.name
diff --git a/spec/ameba/formatter/dot_formatter_spec.cr b/spec/ameba/formatter/dot_formatter_spec.cr
index eac49dcf..b49700fb 100644
--- a/spec/ameba/formatter/dot_formatter_spec.cr
+++ b/spec/ameba/formatter/dot_formatter_spec.cr
@@ -20,7 +20,7 @@ module Ameba::Formatter
 
       it "writes invalid source" do
         s = Source.new ""
-        s.error DummyRule.new, nil, "message"
+        s.add_issue DummyRule.new, Crystal::Nop.new, "message"
         subject.source_finished s
         output.to_s.should contain "F"
       end
@@ -37,11 +37,11 @@ module Ameba::Formatter
         output.to_s.should contain "Finished in"
       end
 
-      context "when errors found" do
-        it "writes each error" do
+      context "when issues found" do
+        it "writes each issue" do
           s = Source.new("").tap do |source|
-            source.error(DummyRule.new, 1, 1, "DummyRuleError")
-            source.error(NamedRule.new, 1, 2, "NamedRuleError")
+            source.add_issue(DummyRule.new, {1, 1}, "DummyRuleError")
+            source.add_issue(NamedRule.new, {1, 2}, "NamedRuleError")
           end
           subject.finished [s]
           log = output.to_s
@@ -50,9 +50,10 @@ module Ameba::Formatter
           log.should contain "NamedRuleError"
         end
 
-        it "does not write disabled errors" do
+        it "does not write disabled issues" do
           s = Source.new ""
-          s.error(DummyRule.new, 1, 1, "DummyRuleError", :disabled)
+          s.add_issue(DummyRule.new, location: {1, 1},
+            message: "DummyRuleError", status: :disabled)
           subject.finished [s]
           output.to_s.should contain "1 inspected, 0 failures."
         end
diff --git a/spec/ameba/formatter/flycheck_formatter_spec.cr b/spec/ameba/formatter/flycheck_formatter_spec.cr
index 2b4785ce..7d7ec44c 100644
--- a/spec/ameba/formatter/flycheck_formatter_spec.cr
+++ b/spec/ameba/formatter/flycheck_formatter_spec.cr
@@ -16,9 +16,9 @@ module Ameba::Formatter
     end
 
     context "when problems found" do
-      it "reports an error" do
+      it "reports an issue" do
         s = Source.new "a = 1", "source.cr"
-        s.error DummyRule.new, 1, 2, "message"
+        s.add_issue DummyRule.new, {1, 2}, "message"
         subject = flycheck
         subject.source_finished s
         subject.output.to_s.should eq(
@@ -28,7 +28,7 @@ module Ameba::Formatter
 
       it "properly reports multi-line message" do
         s = Source.new "a = 1", "source.cr"
-        s.error DummyRule.new, 1, 2, "multi\nline"
+        s.add_issue DummyRule.new, {1, 2}, "multi\nline"
         subject = flycheck
         subject.source_finished s
         subject.output.to_s.should eq(
@@ -38,7 +38,7 @@ module Ameba::Formatter
 
       it "reports nothing if location was not set" do
         s = Source.new "a = 1", "source.cr"
-        s.error DummyRule.new, nil, "message"
+        s.add_issue DummyRule.new, Crystal::Nop.new, "message"
         subject = flycheck
         subject.source_finished s
         subject.output.to_s.should eq ""
diff --git a/spec/ameba/formatter/json_formatter_spec.cr b/spec/ameba/formatter/json_formatter_spec.cr
index e21d56ad..287feb42 100644
--- a/spec/ameba/formatter/json_formatter_spec.cr
+++ b/spec/ameba/formatter/json_formatter_spec.cr
@@ -31,26 +31,26 @@ module Ameba
 
       it "shows rule name" do
         s = Source.new ""
-        s.error DummyRule.new, 1, 2, "message1"
+        s.add_issue DummyRule.new, {1, 2}, "message1"
 
         result = get_result [s]
-        result["sources"][0]["errors"][0]["rule_name"].should eq DummyRule.name
+        result["sources"][0]["issues"][0]["rule_name"].should eq DummyRule.name
       end
 
       it "shows a message" do
         s = Source.new ""
-        s.error DummyRule.new, 1, 2, "message"
+        s.add_issue DummyRule.new, {1, 2}, "message"
 
         result = get_result [s]
-        result["sources"][0]["errors"][0]["message"].should eq "message"
+        result["sources"][0]["issues"][0]["message"].should eq "message"
       end
 
-      it "shows error location" do
+      it "shows issue location" do
         s = Source.new ""
-        s.error DummyRule.new, 1, 2, "message"
+        s.add_issue DummyRule.new, {1, 2}, "message"
 
         result = get_result [s]
-        location = result["sources"][0]["errors"][0]["location"]
+        location = result["sources"][0]["issues"][0]["location"]
         location["line"].should eq 1
         location["column"].should eq 2
       end
@@ -62,16 +62,16 @@ module Ameba
         result["summary"]["target_sources_count"].should eq 2
       end
 
-      it "shows errors count" do
+      it "shows issues count" do
         s1 = Source.new ""
-        s1.error DummyRule.new, 1, 2, "message1"
-        s1.error DummyRule.new, 1, 2, "message2"
+        s1.add_issue DummyRule.new, {1, 2}, "message1"
+        s1.add_issue DummyRule.new, {1, 2}, "message2"
 
         s2 = Source.new ""
-        s2.error DummyRule.new, 1, 2, "message3"
+        s2.add_issue DummyRule.new, {1, 2}, "message3"
 
         result = get_result [s1, s2]
-        result["summary"]["errors_count"].should eq 3
+        result["summary"]["issues_count"].should eq 3
       end
     end
   end
diff --git a/spec/ameba/formatter/todo_formatter_spec.cr b/spec/ameba/formatter/todo_formatter_spec.cr
index 631272f9..0ed10575 100644
--- a/spec/ameba/formatter/todo_formatter_spec.cr
+++ b/spec/ameba/formatter/todo_formatter_spec.cr
@@ -6,7 +6,7 @@ module Ameba
     formatter = Formatter::TODOFormatter.new IO::Memory.new, file
 
     s = Source.new "a = 1", "source.cr"
-    s.error DummyRule.new, 1, 2, "message"
+    s.add_issue DummyRule.new, {1, 2}, "message"
 
     formatter.finished [s]
     file.to_s
@@ -57,7 +57,7 @@ module Ameba
           formatter = Formatter::TODOFormatter.new IO::Memory.new, file
 
           s = Source.new "def invalid_syntax"
-          s.error Rule::Syntax.new, 1, 2, "message"
+          s.add_issue Rule::Syntax.new, {1, 2}, "message"
 
           formatter.finished [s]
           content = file.to_s
diff --git a/spec/ameba/inline_comments_spec.cr b/spec/ameba/inline_comments_spec.cr
index e0bd843e..95971c75 100644
--- a/spec/ameba/inline_comments_spec.cr
+++ b/spec/ameba/inline_comments_spec.cr
@@ -7,7 +7,7 @@ module Ameba
         # ameba:disable #{NamedRule.name}
         Time.epoch(1483859302)
       )
-      s.error(NamedRule.new, 3, 12, "Error!")
+      s.add_issue(NamedRule.new, location: {3, 12}, message: "Error!")
       s.should be_valid
     end
 
@@ -15,7 +15,7 @@ module Ameba
       s = Source.new %Q(
         Time.epoch(1483859302) # ameba:disable #{NamedRule.name}
       )
-      s.error(NamedRule.new, 2, 12, "Error!")
+      s.add_issue(NamedRule.new, location: {2, 12}, message: "Error!")
       s.should be_valid
     end
 
@@ -24,7 +24,7 @@ module Ameba
         # ameba:disable WrongName
         Time.epoch(1483859302)
       )
-      s.error(NamedRule.new, 3, 12, "Error!")
+      s.add_issue(NamedRule.new, location: {3, 12}, message: "Error!")
       s.should_not be_valid
     end
 
@@ -33,7 +33,7 @@ module Ameba
         # ameba:disable SomeRule LargeNumbers #{NamedRule.name} SomeOtherRule
         Time.epoch(1483859302)
       )
-      s.error(NamedRule.new, 3, 12, "")
+      s.add_issue(NamedRule.new, location: {3, 12}, message: "")
       s.should be_valid
     end
 
@@ -42,7 +42,7 @@ module Ameba
         # ameba:disable SomeRule, LargeNumbers, #{NamedRule.name}, SomeOtherRule
         Time.epoch(1483859302)
       )
-      s.error(NamedRule.new, 3, 12, "")
+      s.add_issue(NamedRule.new, location: {3, 12}, message: "")
       s.should be_valid
     end
 
@@ -51,7 +51,7 @@ module Ameba
         # ameba:disable SomeRule, SomeOtherRule LargeNumbers
         Time.epoch(1483859302)
       )
-      s.error(NamedRule.new, 3, 12, "")
+      s.add_issue(NamedRule.new, location: {3, 12}, message: "")
       s.should_not be_valid
     end
 
@@ -61,7 +61,7 @@ module Ameba
         #
         Time.epoch(1483859302)
       )
-      s.error(NamedRule.new, 4, 12, "")
+      s.add_issue(NamedRule.new, location: {4, 12}, message: "")
       s.should_not be_valid
     end
 
@@ -71,7 +71,7 @@ module Ameba
           Time.epoch(1483859302)
         end
       )
-      s.error(NamedRule.new, 3, 12, "")
+      s.add_issue(NamedRule.new, location: {3, 12}, message: "")
       s.should_not be_valid
     end
 
@@ -80,7 +80,7 @@ module Ameba
         "ameba:disable #{NamedRule.name}"
         Time.epoch(1483859302)
       )
-      s.error(NamedRule.new, 3, 12, "")
+      s.add_issue(NamedRule.new, location: {3, 12}, message: "")
       s.should_not be_valid
     end
 
@@ -89,7 +89,7 @@ module Ameba
         # # ameba:disable #{NamedRule.name}
         Time.epoch(1483859302)
       )
-      s.error(NamedRule.new, 3, 12, "")
+      s.add_issue(NamedRule.new, location: {3, 12}, message: "")
       s.should_not be_valid
     end
 
@@ -97,7 +97,7 @@ module Ameba
       s = Source.new %Q(
         a = 1 # Disable it: # ameba:disable #{NamedRule.name}
       )
-      s.error(NamedRule.new, 2, 12, "")
+      s.add_issue(NamedRule.new, location: {2, 12}, message: "")
       s.should_not be_valid
     end
   end
diff --git a/spec/ameba/issue_spec.cr b/spec/ameba/issue_spec.cr
new file mode 100644
index 00000000..652f5247
--- /dev/null
+++ b/spec/ameba/issue_spec.cr
@@ -0,0 +1,50 @@
+require "../spec_helper"
+
+module Ameba
+  describe Issue do
+    it "accepts rule and message" do
+      issue = Issue.new rule: DummyRule.new,
+        location: nil,
+        end_location: nil,
+        message: "Blah",
+        status: nil
+
+      issue.rule.should_not be_nil
+      issue.message.should eq "Blah"
+    end
+
+    it "accepts location" do
+      location = Crystal::Location.new("path", 3, 2)
+      issue = Issue.new rule: DummyRule.new,
+        location: location,
+        end_location: nil,
+        message: "Blah",
+        status: nil
+
+      issue.location.to_s.should eq location.to_s
+      issue.end_location.should eq nil
+    end
+
+    it "accepts end_location" do
+      location = Crystal::Location.new("path", 3, 2)
+      issue = Issue.new rule: DummyRule.new,
+        location: nil,
+        end_location: location,
+        message: "Blah",
+        status: nil
+
+      issue.location.should eq nil
+      issue.end_location.to_s.should eq location.to_s
+    end
+
+    it "accepts status" do
+      issue = Issue.new rule: DummyRule.new,
+        location: nil,
+        end_location: nil,
+        message: "",
+        status: :enabled
+
+      issue.status.should eq :enabled
+    end
+  end
+end
diff --git a/spec/ameba/reportable_spec.cr b/spec/ameba/reportable_spec.cr
new file mode 100644
index 00000000..8d85a55a
--- /dev/null
+++ b/spec/ameba/reportable_spec.cr
@@ -0,0 +1,40 @@
+require "../spec_helper"
+
+module Ameba
+  describe Reportable do
+    describe "#add_issue" do
+      it "adds a new issue for node" do
+        s = Source.new "", "source.cr"
+        s.add_issue(DummyRule.new, Crystal::Nop.new, "Error!")
+
+        issue = s.issues.first
+        issue.rule.should_not be_nil
+        issue.location.to_s.should eq ""
+        issue.message.should eq "Error!"
+      end
+
+      it "adds a new issue by line and column number" do
+        s = Source.new "", "source.cr"
+        s.add_issue(DummyRule.new, {23, 2}, "Error!")
+
+        issue = s.issues.first
+        issue.rule.should_not be_nil
+        issue.location.to_s.should eq "source.cr:23:2"
+        issue.message.should eq "Error!"
+      end
+    end
+
+    describe "#valid?" do
+      it "returns true if no issues added" do
+        s = Source.new "", "source.cr"
+        s.should be_valid
+      end
+
+      it "returns false if there are issues added" do
+        s = Source.new "", "source.cr"
+        s.add_issue DummyRule.new, {22, 2}, "ERROR!"
+        s.should_not be_valid
+      end
+    end
+  end
+end
diff --git a/spec/ameba/rule/comparison_to_boolean_spec.cr b/spec/ameba/rule/comparison_to_boolean_spec.cr
index c73a6ff7..9c14c360 100644
--- a/spec/ameba/rule/comparison_to_boolean_spec.cr
+++ b/spec/ameba/rule/comparison_to_boolean_spec.cr
@@ -66,10 +66,10 @@ module Ameba::Rule
         source = Source.new "a != true", "source.cr"
         subject.catch(source)
 
-        error = source.errors.first
-        error.rule.should_not be_nil
-        error.location.to_s.should eq "source.cr:1:1"
-        error.message.should eq "Comparison to a boolean is pointless"
+        issue = source.issues.first
+        issue.rule.should_not be_nil
+        issue.location.to_s.should eq "source.cr:1:1"
+        issue.message.should eq "Comparison to a boolean is pointless"
       end
     end
 
@@ -103,10 +103,10 @@ module Ameba::Rule
         source = Source.new "true != a", "source.cr"
         subject.catch(source).should_not be_valid
 
-        error = source.errors.first
-        error.rule.should_not be_nil
-        error.location.to_s.should eq "source.cr:1:1"
-        error.message.should eq "Comparison to a boolean is pointless"
+        issue = source.issues.first
+        issue.rule.should_not be_nil
+        issue.location.to_s.should eq "source.cr:1:1"
+        issue.message.should eq "Comparison to a boolean is pointless"
       end
     end
   end
diff --git a/spec/ameba/rule/constant_names_spec.cr b/spec/ameba/rule/constant_names_spec.cr
index 778d7b00..3a0529f6 100644
--- a/spec/ameba/rule/constant_names_spec.cr
+++ b/spec/ameba/rule/constant_names_spec.cr
@@ -7,7 +7,7 @@ module Ameba
     it "reports constant name #{expected}" do
       s = Source.new code
       Rule::ConstantNames.new.catch(s).should_not be_valid
-      s.errors.first.message.should contain expected
+      s.issues.first.message.should contain expected
     end
   end
 
@@ -40,10 +40,10 @@ module Ameba
         Const = 1
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq(
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq(
         "Constant name should be screaming-cased: CONST, not Const"
       )
     end
diff --git a/spec/ameba/rule/debugger_statement_spec.cr b/spec/ameba/rule/debugger_statement_spec.cr
index bdd19753..358a3819 100644
--- a/spec/ameba/rule/debugger_statement_spec.cr
+++ b/spec/ameba/rule/debugger_statement_spec.cr
@@ -35,10 +35,10 @@ module Ameba::Rule
       s = Source.new "debugger", "source.cr"
       subject.catch(s).should_not be_valid
 
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:1:1"
-      error.message.should eq "Possible forgotten debugger statement detected"
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:1:1"
+      issue.message.should eq "Possible forgotten debugger statement detected"
     end
   end
 end
diff --git a/spec/ameba/rule/empty_ensure_spec.cr b/spec/ameba/rule/empty_ensure_spec.cr
index 0d4c4e4b..a63eedca 100644
--- a/spec/ameba/rule/empty_ensure_spec.cr
+++ b/spec/ameba/rule/empty_ensure_spec.cr
@@ -58,11 +58,11 @@ module Ameba::Rule
         end
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
+      issue = s.issues.first
 
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:3:11"
-      error.message.should eq "Empty `ensure` block detected"
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:3:11"
+      issue.message.should eq "Empty `ensure` block detected"
     end
   end
 end
diff --git a/spec/ameba/rule/empty_expression_spec.cr b/spec/ameba/rule/empty_expression_spec.cr
index 05b1e60a..a1aa41d8 100644
--- a/spec/ameba/rule/empty_expression_spec.cr
+++ b/spec/ameba/rule/empty_expression_spec.cr
@@ -101,10 +101,10 @@ module Ameba
         end
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:12"
-      error.message.should eq "Avoid empty expressions"
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:12"
+      issue.message.should eq "Avoid empty expressions"
     end
   end
 end
diff --git a/spec/ameba/rule/hash_duplicated_key_spec.cr b/spec/ameba/rule/hash_duplicated_key_spec.cr
index 4f03e1bd..5e078513 100644
--- a/spec/ameba/rule/hash_duplicated_key_spec.cr
+++ b/spec/ameba/rule/hash_duplicated_key_spec.cr
@@ -32,10 +32,10 @@ module Ameba::Rule
         h = {"a" => 1, "a" => 2}
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:13"
-      error.message.should eq %(Duplicated keys in hash literal: "a")
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:13"
+      issue.message.should eq %(Duplicated keys in hash literal: "a")
     end
 
     it "reports multiple duplicated keys" do
@@ -43,8 +43,8 @@ module Ameba::Rule
         h = {"key1" => 1, "key1" => 2, "key2" => 3, "key2" => 4}
       )
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.message.should eq %(Duplicated keys in hash literal: "key1", "key2")
+      issue = s.issues.first
+      issue.message.should eq %(Duplicated keys in hash literal: "key1", "key2")
     end
   end
 end
diff --git a/spec/ameba/rule/large_numbers_spec.cr b/spec/ameba/rule/large_numbers_spec.cr
index 89c619ad..35d979b0 100644
--- a/spec/ameba/rule/large_numbers_spec.cr
+++ b/spec/ameba/rule/large_numbers_spec.cr
@@ -7,7 +7,7 @@ module Ameba
     it "transforms large number #{number}" do
       s = Source.new number
       Rule::LargeNumbers.new.catch(s).should_not be_valid
-      s.errors.first.message.should contain expected
+      s.issues.first.message.should contain expected
     end
   end
 
@@ -115,10 +115,10 @@ module Ameba
          1200000
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:10"
-      error.message.should match /1_200_000/
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:10"
+      issue.message.should match /1_200_000/
     end
 
     context "properties" do
diff --git a/spec/ameba/rule/line_length_spec.cr b/spec/ameba/rule/line_length_spec.cr
index 4c6ae563..2b75efef 100644
--- a/spec/ameba/rule/line_length_spec.cr
+++ b/spec/ameba/rule/line_length_spec.cr
@@ -24,10 +24,10 @@ module Ameba::Rule
       source = Source.new long_line, "source.cr"
       subject.catch(source).should_not be_valid
 
-      error = source.errors.first
-      error.rule.should eq subject
-      error.location.to_s.should eq "source.cr:1:81"
-      error.message.should eq "Line too long"
+      issue = source.issues.first
+      issue.rule.should eq subject
+      issue.location.to_s.should eq "source.cr:1:81"
+      issue.message.should eq "Line too long"
     end
 
     context "properties" do
diff --git a/spec/ameba/rule/literal_in_condition_spec.cr b/spec/ameba/rule/literal_in_condition_spec.cr
index 8c209e29..839aa9af 100644
--- a/spec/ameba/rule/literal_in_condition_spec.cr
+++ b/spec/ameba/rule/literal_in_condition_spec.cr
@@ -62,11 +62,11 @@ module Ameba::Rule
       ), "source.cr"
       subject.catch(s).should_not be_valid
 
-      s.errors.size.should eq 1
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq "Literal value found in conditional"
+      s.issues.size.should eq 1
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq "Literal value found in conditional"
     end
   end
 end
diff --git a/spec/ameba/rule/literal_in_interpolation_spec.cr b/spec/ameba/rule/literal_in_interpolation_spec.cr
index afc7a19b..11d388e8 100644
--- a/spec/ameba/rule/literal_in_interpolation_spec.cr
+++ b/spec/ameba/rule/literal_in_interpolation_spec.cr
@@ -32,10 +32,10 @@ module Ameba::Rule
       s = Source.new %q("#{4}"), "source.cr"
       subject.catch(s).should_not be_valid
 
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:1:1"
-      error.message.should eq "Literal value found in interpolation"
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:1:1"
+      issue.message.should eq "Literal value found in interpolation"
     end
   end
 end
diff --git a/spec/ameba/rule/method_names_spec.cr b/spec/ameba/rule/method_names_spec.cr
index 030a21bc..447eeb75 100644
--- a/spec/ameba/rule/method_names_spec.cr
+++ b/spec/ameba/rule/method_names_spec.cr
@@ -7,7 +7,7 @@ module Ameba
     it "reports method name #{expected}" do
       s = Source.new code
       Rule::MethodNames.new.catch(s).should_not be_valid
-      s.errors.first.message.should contain expected
+      s.issues.first.message.should contain expected
     end
   end
 
@@ -44,10 +44,10 @@ module Ameba
         end
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq(
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq(
         "Method name should be underscore-cased: bad_name, not bad_Name"
       )
     end
diff --git a/spec/ameba/rule/negated_conditions_in_unless_spec.cr b/spec/ameba/rule/negated_conditions_in_unless_spec.cr
index 39495797..fb8841e4 100644
--- a/spec/ameba/rule/negated_conditions_in_unless_spec.cr
+++ b/spec/ameba/rule/negated_conditions_in_unless_spec.cr
@@ -59,10 +59,10 @@ module Ameba::Rule
       s = Source.new ":nok unless !s.empty?", "source.cr"
       subject.catch(s).should_not be_valid
 
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:1:1"
-      error.message.should eq "Avoid negated conditions in unless blocks"
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:1:1"
+      issue.message.should eq "Avoid negated conditions in unless blocks"
     end
   end
 end
diff --git a/spec/ameba/rule/percent_arrays_spec.cr b/spec/ameba/rule/percent_arrays_spec.cr
index 9b3ffc97..d9247115 100644
--- a/spec/ameba/rule/percent_arrays_spec.cr
+++ b/spec/ameba/rule/percent_arrays_spec.cr
@@ -44,10 +44,10 @@ module Ameba::Rule
       ), "source.cr"
 
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq(
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq(
         "Symbols `,:` may be unwanted in %i array literals"
       )
     end
@@ -58,10 +58,10 @@ module Ameba::Rule
       ), "source.cr"
 
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq(
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq(
         "Symbols `,\"` may be unwanted in %w array literals"
       )
     end
diff --git a/spec/ameba/rule/predicate_name_spec.cr b/spec/ameba/rule/predicate_name_spec.cr
index 169c30dd..150729d0 100644
--- a/spec/ameba/rule/predicate_name_spec.cr
+++ b/spec/ameba/rule/predicate_name_spec.cr
@@ -38,10 +38,10 @@ module Ameba::Rule
       ), "source.cr"
       subject.catch(s).should_not be_valid
 
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:3:11"
-      error.message.should eq(
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:3:11"
+      issue.message.should eq(
         "Favour method name 'picture?' over 'has_picture?'")
     end
 
diff --git a/spec/ameba/rule/rand_zero_spec.cr b/spec/ameba/rule/rand_zero_spec.cr
index cb886cb4..c3ee4c40 100644
--- a/spec/ameba/rule/rand_zero_spec.cr
+++ b/spec/ameba/rule/rand_zero_spec.cr
@@ -26,11 +26,11 @@ module Ameba::Rule
     it "reports rule, location and a message" do
       s = Source.new "rand(1)", "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
+      issue = s.issues.first
 
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:1:1"
-      error.message.should eq "rand(1) always returns 0"
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:1:1"
+      issue.message.should eq "rand(1) always returns 0"
     end
   end
 end
diff --git a/spec/ameba/rule/redundant_begin_spec.cr b/spec/ameba/rule/redundant_begin_spec.cr
index 7bdad9a9..4f383777 100644
--- a/spec/ameba/rule/redundant_begin_spec.cr
+++ b/spec/ameba/rule/redundant_begin_spec.cr
@@ -204,10 +204,10 @@ module Ameba::Rule
       ), "source.cr"
       subject.catch(s).should_not be_valid
 
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq "Redundant `begin` block detected"
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq "Redundant `begin` block detected"
     end
   end
 end
diff --git a/spec/ameba/rule/shadowed_argument_spec.cr b/spec/ameba/rule/shadowed_argument_spec.cr
index 5e88dc23..121a7eab 100644
--- a/spec/ameba/rule/shadowed_argument_spec.cr
+++ b/spec/ameba/rule/shadowed_argument_spec.cr
@@ -156,10 +156,10 @@ module Ameba::Rule
       ), "source.cr"
       subject.catch(s).should_not be_valid
 
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:3:11"
-      error.message.should eq "Argument `bar` is assigned before it is used"
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:3:11"
+      issue.message.should eq "Argument `bar` is assigned before it is used"
     end
   end
 end
diff --git a/spec/ameba/rule/shadowed_exception_spec.cr b/spec/ameba/rule/shadowed_exception_spec.cr
index 366743b9..42b23404 100644
--- a/spec/ameba/rule/shadowed_exception_spec.cr
+++ b/spec/ameba/rule/shadowed_exception_spec.cr
@@ -3,7 +3,7 @@ require "../../spec_helper"
 private def check_shadowed(source, exceptions)
   s = Ameba::Source.new source
   Ameba::Rule::ShadowedException.new.catch(s).should_not be_valid
-  s.errors.first.message.should contain exceptions.join(", ")
+  s.issues.first.message.should contain exceptions.join(", ")
 end
 
 module Ameba::Rule
@@ -163,11 +163,11 @@ module Ameba::Rule
         end
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
+      issue = s.issues.first
 
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:3:11"
-      error.message.should eq(
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:3:11"
+      issue.message.should eq(
         "Exception handler has shadowed exceptions: IndexError"
       )
     end
diff --git a/spec/ameba/rule/shadowing_local_outer_var_spec.cr b/spec/ameba/rule/shadowing_local_outer_var_spec.cr
index 75e19f35..5eb83396 100644
--- a/spec/ameba/rule/shadowing_local_outer_var_spec.cr
+++ b/spec/ameba/rule/shadowing_local_outer_var_spec.cr
@@ -68,7 +68,7 @@ module Ameba::Rule
       )
       subject.catch(source).should_not be_valid
 
-      source.errors.size.should eq 2
+      source.issues.size.should eq 2
     end
 
     it "reports if a splat block argument shadows local var" do
@@ -89,7 +89,7 @@ module Ameba::Rule
         end
       )
       subject.catch(source).should_not be_valid
-      source.errors.first.message.should eq "Shadowing outer local variable `block`"
+      source.issues.first.message.should eq "Shadowing outer local variable `block`"
     end
 
     it "reports if there are multiple args and one shadows local var" do
@@ -100,7 +100,7 @@ module Ameba::Rule
         end
       )
       subject.catch(source).should_not be_valid
-      source.errors.first.message.should eq "Shadowing outer local variable `foo`"
+      source.issues.first.message.should eq "Shadowing outer local variable `foo`"
     end
 
     it "doesn't report if an outer var is reassigned in a block" do
@@ -131,10 +131,10 @@ module Ameba::Rule
       ), "source.cr"
       subject.catch(source).should_not be_valid
 
-      error = source.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:3:20"
-      error.message.should eq "Shadowing outer local variable `foo`"
+      issue = source.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:3:20"
+      issue.message.should eq "Shadowing outer local variable `foo`"
     end
   end
 end
diff --git a/spec/ameba/rule/syntax_spec.cr b/spec/ameba/rule/syntax_spec.cr
index 79b2d8a9..f234e6f8 100644
--- a/spec/ameba/rule/syntax_spec.cr
+++ b/spec/ameba/rule/syntax_spec.cr
@@ -27,11 +27,11 @@ module Ameba::Rule
     it "reports rule, location and message" do
       s = Source.new "def hello end", "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
+      issue = s.issues.first
 
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:1:11"
-      error.message.should eq "unexpected token: end (expected ';' or newline)"
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:1:11"
+      issue.message.should eq "unexpected token: end (expected ';' or newline)"
     end
   end
 end
diff --git a/spec/ameba/rule/trailing_blank_lines_spec.cr b/spec/ameba/rule/trailing_blank_lines_spec.cr
index b24849c3..ca3cf13c 100644
--- a/spec/ameba/rule/trailing_blank_lines_spec.cr
+++ b/spec/ameba/rule/trailing_blank_lines_spec.cr
@@ -28,10 +28,10 @@ module Ameba::Rule
       source = Source.new "a = 1\n\n ", "source.cr"
       subject.catch(source).should_not be_valid
 
-      error = source.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:3:1"
-      error.message.should eq "Blank lines detected at the end of the file"
+      issue = source.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:3:1"
+      issue.message.should eq "Blank lines detected at the end of the file"
     end
   end
 end
diff --git a/spec/ameba/rule/trailing_whitespace_spec.cr b/spec/ameba/rule/trailing_whitespace_spec.cr
index a736cedb..260a65d7 100644
--- a/spec/ameba/rule/trailing_whitespace_spec.cr
+++ b/spec/ameba/rule/trailing_whitespace_spec.cr
@@ -18,10 +18,10 @@ module Ameba::Rule
       source = Source.new "a = 1\n b = 2 ", "source.cr"
       subject.catch(source).should_not be_valid
 
-      error = source.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:7"
-      error.message.should eq "Trailing whitespace detected"
+      issue = source.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:7"
+      issue.message.should eq "Trailing whitespace detected"
     end
   end
 end
diff --git a/spec/ameba/rule/type_names_spec.cr b/spec/ameba/rule/type_names_spec.cr
index 3dc18312..e7b55510 100644
--- a/spec/ameba/rule/type_names_spec.cr
+++ b/spec/ameba/rule/type_names_spec.cr
@@ -7,7 +7,7 @@ module Ameba
     it "reports type name #{expected}" do
       s = Source.new code
       Rule::TypeNames.new.catch(s).should_not be_valid
-      s.errors.first.message.should contain expected
+      s.issues.first.message.should contain expected
     end
   end
 
@@ -49,10 +49,10 @@ module Ameba
         end
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq(
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq(
         "Type name should be camelcased: MyClass, but it was My_class"
       )
     end
diff --git a/spec/ameba/rule/unless_else_spec.cr b/spec/ameba/rule/unless_else_spec.cr
index 49898642..98466a69 100644
--- a/spec/ameba/rule/unless_else_spec.cr
+++ b/spec/ameba/rule/unless_else_spec.cr
@@ -34,11 +34,11 @@ module Ameba::Rule
       ), "source.cr"
       subject.catch(s).should_not be_valid
 
-      error = s.errors.first
-      error.should_not be_nil
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq "Favour if over unless with else"
+      issue = s.issues.first
+      issue.should_not be_nil
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq "Favour if over unless with else"
     end
   end
 end
diff --git a/spec/ameba/rule/unneded_disable_directive_spec.cr b/spec/ameba/rule/unneded_disable_directive_spec.cr
index 0c50784c..2efbbcad 100644
--- a/spec/ameba/rule/unneded_disable_directive_spec.cr
+++ b/spec/ameba/rule/unneded_disable_directive_spec.cr
@@ -23,7 +23,8 @@ module Ameba::Rule
         # ameba:disable #{NamedRule.name}
         a = 1
       )
-      s.error NamedRule.new, 3, 9, "Useless assignment", :disabled
+      s.add_issue NamedRule.new, location: {3, 9},
+        message: "Useless assignment", status: :disabled
       subject.catch(s).should be_valid
     end
 
@@ -31,7 +32,8 @@ module Ameba::Rule
       s = Source.new %Q(
         a = 1 # ameba:disable #{NamedRule.name}
       )
-      s.error NamedRule.new, 2, 1, "Alarm!", :disabled
+      s.add_issue NamedRule.new, location: {2, 1},
+        message: "Alarm!", status: :disabled
       subject.catch(s).should be_valid
     end
 
@@ -40,7 +42,8 @@ module Ameba::Rule
         # # ameba:disable #{NamedRule.name}
         a = 1
       )
-      s.error NamedRule.new, 3, 1, "Alarm!", :disabled
+      s.add_issue NamedRule.new, location: {3, 1},
+        message: "Alarm!", status: :disabled
       subject.catch(s).should be_valid
     end
 
@@ -50,7 +53,7 @@ module Ameba::Rule
         a = 1
       )
       subject.catch(s).should_not be_valid
-      s.errors.first.message.should eq(
+      s.issues.first.message.should eq(
         "Unnecessary disabling of #{NamedRule.name}"
       )
     end
@@ -58,7 +61,7 @@ module Ameba::Rule
     it "fails if there is inline unneeded directive" do
       s = Source.new %Q(a = 1 # ameba:disable #{NamedRule.name})
       subject.catch(s).should_not be_valid
-      s.errors.first.message.should eq(
+      s.issues.first.message.should eq(
         "Unnecessary disabling of #{NamedRule.name}"
       )
     end
@@ -69,9 +72,9 @@ module Ameba::Rule
         a = 1 # ameba:disable Rule3
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      s.errors.size.should eq 2
-      s.errors.first.message.should contain "Rule1, Rule2"
-      s.errors.last.message.should contain "Rule3"
+      s.issues.size.should eq 2
+      s.issues.first.message.should contain "Rule1, Rule2"
+      s.issues.last.message.should contain "Rule3"
     end
 
     it "fails if there is disabled UnneededDisableDirective" do
@@ -79,20 +82,21 @@ module Ameba::Rule
         # ameba:disable #{UnneededDisableDirective.rule_name}
         a = 1
       ), "source.cr"
-      s.error UnneededDisableDirective.new, 3, 1, "Alarm!", :disabled
+      s.add_issue UnneededDisableDirective.new, location: {3, 1},
+        message: "Alarm!", status: :disabled
       subject.catch(s).should_not be_valid
     end
 
-    it "reports error, location and message" do
+    it "reports issue, location and message" do
       s = Source.new %Q(
         # ameba:disable Rule1, Rule2
         a = 1
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq "Unnecessary disabling of Rule1, Rule2"
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq "Unnecessary disabling of Rule1, Rule2"
     end
   end
 end
diff --git a/spec/ameba/rule/unused_argument_spec.cr b/spec/ameba/rule/unused_argument_spec.cr
index 405eb480..944e6ab7 100644
--- a/spec/ameba/rule/unused_argument_spec.cr
+++ b/spec/ameba/rule/unused_argument_spec.cr
@@ -27,7 +27,7 @@ module Ameba::Rule
         end
       )
       subject.catch(s).should_not be_valid
-      s.errors.first.message.should eq "Unused argument `c`. If it's necessary, use `_c` " \
+      s.issues.first.message.should eq "Unused argument `c`. If it's necessary, use `_c` " \
                                        "as an argument name to indicate that it won't be used."
     end
 
@@ -38,7 +38,7 @@ module Ameba::Rule
         end
       )
       subject.catch(s).should_not be_valid
-      s.errors.first.message.should eq "Unused argument `i`. If it's necessary, use `_` " \
+      s.issues.first.message.should eq "Unused argument `i`. If it's necessary, use `_` " \
                                        "as an argument name to indicate that it won't be used."
     end
 
@@ -49,7 +49,7 @@ module Ameba::Rule
         end
       )
       subject.catch(s).should_not be_valid
-      s.errors.first.message.should eq "Unused argument `b`. If it's necessary, use `_b` " \
+      s.issues.first.message.should eq "Unused argument `b`. If it's necessary, use `_b` " \
                                        "as an argument name to indicate that it won't be used."
     end
 
@@ -60,11 +60,11 @@ module Ameba::Rule
         end
       )
       subject.catch(s).should_not be_valid
-      s.errors[0].message.should eq "Unused argument `a`. If it's necessary, use `_a` " \
+      s.issues[0].message.should eq "Unused argument `a`. If it's necessary, use `_a` " \
                                     "as an argument name to indicate that it won't be used."
-      s.errors[1].message.should eq "Unused argument `b`. If it's necessary, use `_b` " \
+      s.issues[1].message.should eq "Unused argument `b`. If it's necessary, use `_b` " \
                                     "as an argument name to indicate that it won't be used."
-      s.errors[2].message.should eq "Unused argument `c`. If it's necessary, use `_c` " \
+      s.issues[2].message.should eq "Unused argument `c`. If it's necessary, use `_c` " \
                                     "as an argument name to indicate that it won't be used."
     end
 
@@ -164,7 +164,7 @@ module Ameba::Rule
           end
         )
         subject.catch(s).should_not be_valid
-        s.errors.first.message.should eq "Unused argument `b`. If it's necessary, use `_b` " \
+        s.issues.first.message.should eq "Unused argument `b`. If it's necessary, use `_b` " \
                                          "as an argument name to indicate that it won't be used."
       end
 
@@ -174,11 +174,11 @@ module Ameba::Rule
           end
         ), "source.cr"
         subject.catch(s).should_not be_valid
-        error = s.errors.first
-        error.rule.should_not be_nil
-        error.message.should eq "Unused argument `a`. If it's necessary, use `_a` " \
+        issue = s.issues.first
+        issue.rule.should_not be_nil
+        issue.message.should eq "Unused argument `a`. If it's necessary, use `_a` " \
                                 "as an argument name to indicate that it won't be used."
-        error.location.to_s.should eq "source.cr:2:22"
+        issue.location.to_s.should eq "source.cr:2:22"
       end
     end
 
diff --git a/spec/ameba/rule/useless_assign_spec.cr b/spec/ameba/rule/useless_assign_spec.cr
index e86493d3..5c9d1f79 100644
--- a/spec/ameba/rule/useless_assign_spec.cr
+++ b/spec/ameba/rule/useless_assign_spec.cr
@@ -75,10 +75,10 @@ module Ameba::Rule
       ), "source.cr"
       subject.catch(s).should_not be_valid
 
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:3:11"
-      error.message.should eq "Useless assignment to variable `a`"
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:3:11"
+      issue.message.should eq "Useless assignment to variable `a`"
     end
 
     it "does not report useless assignment of instance var" do
@@ -137,7 +137,7 @@ module Ameba::Rule
         end
       )
       subject.catch(s).should_not be_valid
-      s.errors.first.location.to_s.should eq ":3:11"
+      s.issues.first.location.to_s.should eq ":3:11"
     end
 
     it "reports if variable reassigned and not used" do
@@ -314,10 +314,10 @@ module Ameba::Rule
         ), "source.cr"
         subject.catch(s).should_not be_valid
 
-        error = s.errors.last
-        error.rule.should_not be_nil
-        error.location.to_s.should eq "source.cr:5:13"
-        error.message.should eq "Useless assignment to variable `a`"
+        issue = s.issues.last
+        issue.rule.should_not be_nil
+        issue.location.to_s.should eq "source.cr:5:13"
+        issue.message.should eq "Useless assignment to variable `a`"
       end
     end
 
@@ -340,9 +340,9 @@ module Ameba::Rule
           end
         )
         subject.catch(s).should_not be_valid
-        error = s.errors.first
-        error.location.to_s.should eq ":3:16"
-        error.message.should eq "Useless assignment to variable `b`"
+        issue = s.issues.first
+        issue.location.to_s.should eq ":3:16"
+        issue.message.should eq "Useless assignment to variable `b`"
       end
 
       it "reports if both assigns are reassigned and useless" do
@@ -363,13 +363,13 @@ module Ameba::Rule
         )
         subject.catch(s).should_not be_valid
 
-        error = s.errors.first
-        error.location.to_s.should eq ":3:13"
-        error.message.should eq "Useless assignment to variable `a`"
+        issue = s.issues.first
+        issue.location.to_s.should eq ":3:13"
+        issue.message.should eq "Useless assignment to variable `a`"
 
-        error = s.errors.last
-        error.location.to_s.should eq ":3:16"
-        error.message.should eq "Useless assignment to variable `b`"
+        issue = s.issues.last
+        issue.location.to_s.should eq ":3:16"
+        issue.message.should eq "Useless assignment to variable `b`"
       end
     end
 
@@ -380,9 +380,9 @@ module Ameba::Rule
           a = 2
         )
         subject.catch(s).should_not be_valid
-        s.errors.size.should eq 2
-        s.errors.first.location.to_s.should eq ":2:11"
-        s.errors.last.location.to_s.should eq ":3:11"
+        s.issues.size.should eq 2
+        s.issues.first.location.to_s.should eq ":2:11"
+        s.issues.last.location.to_s.should eq ":3:11"
       end
 
       it "doesn't report if assignments are referenced" do
@@ -476,8 +476,8 @@ module Ameba::Rule
             end
           )
           subject.catch(s).should_not be_valid
-          s.errors.size.should eq 1
-          s.errors.first.location.to_s.should eq ":5:17"
+          s.issues.size.should eq 1
+          s.issues.first.location.to_s.should eq ":5:17"
         end
 
         it "does not report of assignments are referenced in all branches" do
@@ -545,8 +545,8 @@ module Ameba::Rule
             end
           )
           subject.catch(s).should_not be_valid
-          s.errors.size.should eq 1
-          s.errors.first.location.to_s.should eq ":5:17"
+          s.issues.size.should eq 1
+          s.issues.first.location.to_s.should eq ":5:17"
         end
       end
 
@@ -578,9 +578,9 @@ module Ameba::Rule
             end
           )
           subject.catch(s).should_not be_valid
-          s.errors.size.should eq 2
-          s.errors.first.location.to_s.should eq ":5:17"
-          s.errors.last.location.to_s.should eq ":7:17"
+          s.issues.size.should eq 2
+          s.issues.first.location.to_s.should eq ":5:17"
+          s.issues.last.location.to_s.should eq ":7:17"
         end
 
         it "doesn't report if assignment is referenced in cond" do
@@ -615,8 +615,8 @@ module Ameba::Rule
             end
           )
           subject.catch(s).should_not be_valid
-          s.errors.size.should eq 1
-          s.errors.first.location.to_s.should eq ":3:27"
+          s.issues.size.should eq 1
+          s.issues.first.location.to_s.should eq ":3:27"
         end
       end
 
@@ -642,8 +642,8 @@ module Ameba::Rule
             end
           )
           subject.catch(s).should_not be_valid
-          s.errors.size.should eq 1
-          s.errors.first.location.to_s.should eq ":4:17"
+          s.issues.size.should eq 1
+          s.issues.first.location.to_s.should eq ":4:17"
         end
 
         it "does not report if assignment is referenced in a loop" do
@@ -737,8 +737,8 @@ module Ameba::Rule
             end
           )
           subject.catch(s).should_not be_valid
-          s.errors.size.should eq 1
-          s.errors.first.location.to_s.should eq ":4:17"
+          s.issues.size.should eq 1
+          s.issues.first.location.to_s.should eq ":4:17"
         end
       end
 
@@ -785,8 +785,8 @@ module Ameba::Rule
             end
           )
           subject.catch(s).should_not be_valid
-          s.errors.size.should eq 1
-          s.errors.first.location.to_s.should eq ":4:15"
+          s.issues.size.should eq 1
+          s.issues.first.location.to_s.should eq ":4:15"
         end
       end
     end
diff --git a/spec/ameba/rule/useless_condition_in_when_spec.cr b/spec/ameba/rule/useless_condition_in_when_spec.cr
index d504793c..4c800934 100644
--- a/spec/ameba/rule/useless_condition_in_when_spec.cr
+++ b/spec/ameba/rule/useless_condition_in_when_spec.cr
@@ -36,10 +36,10 @@ module Ameba::Rule
         end
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:6:23"
-      error.message.should eq "Useless condition in when detected"
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:6:23"
+      issue.message.should eq "Useless condition in when detected"
     end
   end
 end
diff --git a/spec/ameba/rule/variable_names_spec.cr b/spec/ameba/rule/variable_names_spec.cr
index 193816e8..58b3fe62 100644
--- a/spec/ameba/rule/variable_names_spec.cr
+++ b/spec/ameba/rule/variable_names_spec.cr
@@ -7,7 +7,7 @@ module Ameba
     it "reports method name #{expected}" do
       s = Source.new code
       Rule::VariableNames.new.catch(s).should_not be_valid
-      s.errors.first.message.should contain expected
+      s.issues.first.message.should contain expected
     end
   end
 
@@ -50,10 +50,10 @@ module Ameba
         badName = "Yeah"
       ), "source.cr"
       subject.catch(s).should_not be_valid
-      error = s.errors.first
-      error.rule.should_not be_nil
-      error.location.to_s.should eq "source.cr:2:9"
-      error.message.should eq(
+      issue = s.issues.first
+      issue.rule.should_not be_nil
+      issue.location.to_s.should eq "source.cr:2:9"
+      issue.message.should eq(
         "Var name should be underscore-cased: bad_name, not badName"
       )
     end
diff --git a/spec/ameba/rule/while_true_spec.cr b/spec/ameba/rule/while_true_spec.cr
index b23b2503..f3a32aaa 100644
--- a/spec/ameba/rule/while_true_spec.cr
+++ b/spec/ameba/rule/while_true_spec.cr
@@ -34,9 +34,9 @@ module Ameba::Rule
       source = Source.new invalid_source, "source.cr"
       subject.catch(source).should_not be_valid
 
-      error = source.errors.first
-      error.location.to_s.should eq "source.cr:2:1"
-      error.message.should eq "While statement using true literal as condition"
+      issue = source.issues.first
+      issue.location.to_s.should eq "source.cr:2:1"
+      issue.message.should eq "While statement using true literal as condition"
     end
   end
 end
diff --git a/spec/ameba/runner_spec.cr b/spec/ameba/runner_spec.cr
index 880f00a3..1f4bf0fa 100644
--- a/spec/ameba/runner_spec.cr
+++ b/spec/ameba/runner_spec.cr
@@ -59,7 +59,7 @@ module Ameba
 
           Runner.new(rules, [source], formatter).run
           source.should_not be_valid
-          source.errors.first.rule.name.should eq Rule::Syntax.rule_name
+          source.issues.first.rule.name.should eq Rule::Syntax.rule_name
         end
 
         it "does not run other rules" do
@@ -72,12 +72,12 @@ module Ameba
 
           Runner.new(rules, [source], formatter).run
           source.should_not be_valid
-          source.errors.size.should eq 1
+          source.issues.size.should eq 1
         end
       end
 
       context "unneeded disables" do
-        it "reports an error if such disable exists" do
+        it "reports an issue if such disable exists" do
           rules = [Rule::UnneededDisableDirective.new] of Rule::Base
           source = Source.new %(
             a = 1 # ameba:disable LineLength
@@ -85,7 +85,7 @@ module Ameba
 
           Runner.new(rules, [source], formatter).run
           source.should_not be_valid
-          source.errors.first.rule.name.should eq Rule::UnneededDisableDirective.rule_name
+          source.issues.first.rule.name.should eq Rule::UnneededDisableDirective.rule_name
         end
       end
     end
diff --git a/spec/ameba/source_spec.cr b/spec/ameba/source_spec.cr
index 830c3f5f..cd8af875 100644
--- a/spec/ameba/source_spec.cr
+++ b/spec/ameba/source_spec.cr
@@ -11,19 +11,6 @@ module Ameba
       end
     end
 
-    describe "#error" do
-      it "adds and error" do
-        s = Source.new "", "source.cr"
-        s.error(DummyRule.new, 23, 2, "Error!")
-        s.should_not be_valid
-
-        error = s.errors.first
-        error.rule.should_not be_nil
-        error.location.to_s.should eq "source.cr:23:2"
-        error.message.should eq "Error!"
-      end
-    end
-
     describe "#fullpath" do
       it "returns a relative path of the source" do
         s = Source.new "", "./source_spec.cr"
diff --git a/spec/spec_helper.cr b/spec/spec_helper.cr
index b91e5e5d..a1e96dd7 100644
--- a/spec/spec_helper.cr
+++ b/spec/spec_helper.cr
@@ -26,7 +26,7 @@ module Ameba
 
   struct ErrorRule < Rule::Base
     def test(source)
-      source.error self, 1, 1, "This rule always adds an error"
+      issue_for({1, 1}, "This rule always adds an error")
     end
   end
 
@@ -71,8 +71,8 @@ module Ameba
 
     def failure_message(source)
       String.build do |str|
-        str << "Source expected to be valid, but there are errors:\n\n"
-        source.errors.reject(&.disabled?).each do |e|
+        str << "Source expected to be valid, but there are issues: \n\n"
+        source.issues.reject(&.disabled?).each do |e|
           str << "  * #{e.rule.name}: #{e.message}\n"
         end
       end
diff --git a/src/ameba/formatter/disabled_formatter.cr b/src/ameba/formatter/disabled_formatter.cr
index 8c4e03f6..3957032d 100644
--- a/src/ameba/formatter/disabled_formatter.cr
+++ b/src/ameba/formatter/disabled_formatter.cr
@@ -5,7 +5,7 @@ module Ameba::Formatter
       output << "Disabled rules using inline directives: \n\n"
 
       sources.each do |source|
-        source.errors.select(&.disabled?).each do |e|
+        source.issues.select(&.disabled?).each do |e|
           if loc = e.location
             output << "#{source.path}:#{loc.line_number}".colorize(:cyan)
             output << " #{e.rule.name}\n"
diff --git a/src/ameba/formatter/dot_formatter.cr b/src/ameba/formatter/dot_formatter.cr
index 88b3edb6..f3f97028 100644
--- a/src/ameba/formatter/dot_formatter.cr
+++ b/src/ameba/formatter/dot_formatter.cr
@@ -24,10 +24,10 @@ module Ameba::Formatter
       failed_sources = sources.reject &.valid?
 
       failed_sources.each do |source|
-        source.errors.each do |error|
-          next if error.disabled?
-          output << "#{error.location}\n".colorize(:cyan)
-          output << "#{error.rule.name}: #{error.message}\n\n".colorize(:red)
+        source.issues.each do |issue|
+          next if issue.disabled?
+          output << "#{issue.location}\n".colorize(:cyan)
+          output << "#{issue.rule.name}: #{issue.message}\n\n".colorize(:red)
         end
       end
 
@@ -71,7 +71,7 @@ module Ameba::Formatter
 
     private def final_message(sources, failed_sources)
       total = sources.size
-      failures = failed_sources.map { |f| f.errors.size }.sum
+      failures = failed_sources.map { |f| f.issues.size }.sum
       color = failures == 0 ? :green : :red
       s = failures != 1 ? "s" : ""
 
diff --git a/src/ameba/formatter/flycheck_formatter.cr b/src/ameba/formatter/flycheck_formatter.cr
index 21e96547..47e0e388 100644
--- a/src/ameba/formatter/flycheck_formatter.cr
+++ b/src/ameba/formatter/flycheck_formatter.cr
@@ -1,7 +1,7 @@
 module Ameba::Formatter
   class FlycheckFormatter < BaseFormatter
     def source_finished(source : Source)
-      source.errors.each do |e|
+      source.issues.each do |e|
         next if e.disabled?
         if loc = e.location
           output.printf "%s:%d:%d: %s: [%s] %s\n",
diff --git a/src/ameba/formatter/json_formatter.cr b/src/ameba/formatter/json_formatter.cr
index a1b8e8a6..9e982cdc 100644
--- a/src/ameba/formatter/json_formatter.cr
+++ b/src/ameba/formatter/json_formatter.cr
@@ -13,7 +13,7 @@ module Ameba::Formatter
   #   },
   #   "sources": [
   #     {
-  #       "errors": [
+  #       "issues": [
   #         {
   #           "location": {
   #             "column": 7,
@@ -43,7 +43,7 @@ module Ameba::Formatter
   #     },
   #   ],
   #   "summary": {
-  #     "errors_count":         3,
+  #     "issues_count":         3,
   #     "target_sources_count": 1,
   #   },
   # }
@@ -61,10 +61,10 @@ module Ameba::Formatter
     def source_finished(source : Source)
       json_source = AsJSON::Source.new source.path
 
-      source.errors.each do |e|
+      source.issues.each do |e|
         next if e.disabled?
-        json_source.errors << AsJSON::Error.new(e.rule.name, e.location, e.message)
-        @result.summary.errors_count += 1
+        json_source.issues << AsJSON::Issue.new(e.rule.name, e.location, e.message)
+        @result.summary.issues_count += 1
       end
 
       @result.sources << json_source
@@ -87,13 +87,13 @@ module Ameba::Formatter
 
     record Source,
       path : String,
-      errors = [] of Error do
+      issues = [] of Issue do
       def to_json(json)
-        {path: path, errors: errors}.to_json(json)
+        {path: path, issues: issues}.to_json(json)
       end
     end
 
-    record Error,
+    record Issue,
       rule_name : String,
       location : Crystal::Location?,
       message : String do
@@ -120,12 +120,12 @@ module Ameba::Formatter
 
     class Summary
       property target_sources_count = 0
-      property errors_count = 0
+      property issues_count = 0
 
       def to_json(json)
         json.object do
           json.field :target_sources_count, target_sources_count
-          json.field :errors_count, errors_count
+          json.field :issues_count, issues_count
         end
       end
     end
diff --git a/src/ameba/formatter/todo_formatter.cr b/src/ameba/formatter/todo_formatter.cr
index b0f0bfa8..d0bb22dc 100644
--- a/src/ameba/formatter/todo_formatter.cr
+++ b/src/ameba/formatter/todo_formatter.cr
@@ -1,6 +1,6 @@
 module Ameba::Formatter
   # A formatter that creates a todo config.
-  # Basically, it takes all errors reported and disables corresponding rules
+  # Basically, it takes all issues reported and disables corresponding rules
   # or excludes failed sources from these rules.
   class TODOFormatter < DotFormatter
     @io : IO::FileDescriptor | IO::Memory
@@ -10,30 +10,30 @@ module Ameba::Formatter
 
     def finished(sources)
       super
-      errors = sources.map(&.errors).flatten
-      generate_todo_config errors if errors.any?
+      issues = sources.map(&.issues).flatten
+      generate_todo_config issues if issues.any?
       if (io = @io).is_a?(File)
         @output << "Created #{io.path}\n"
       end
     end
 
-    private def generate_todo_config(errors)
+    private def generate_todo_config(issues)
       @io << header
-      rule_errors_map(errors).each do |rule, rule_errors|
-        @io << "\n# Problems found: #{rule_errors.size}"
+      rule_issues_map(issues).each do |rule, rule_issues|
+        @io << "\n# Problems found: #{rule_issues.size}"
         @io << "\n# Run `ameba --only #{rule.name}` for details"
-        @io << rule_todo(rule, rule_errors).gsub("---", "")
+        @io << rule_todo(rule, rule_issues).gsub("---", "")
       end
     ensure
       @io.flush
     end
 
-    private def rule_errors_map(errors)
-      Hash(Rule::Base, Array(Source::Error)).new.tap do |h|
-        errors.each do |error|
-          next if error.disabled? || error.rule.is_a? Rule::Syntax
-          h[error.rule] ||= Array(Source::Error).new
-          h[error.rule] << error
+    private def rule_issues_map(issues)
+      Hash(Rule::Base, Array(Issue)).new.tap do |h|
+        issues.each do |issue|
+          next if issue.disabled? || issue.rule.is_a? Rule::Syntax
+          h[issue.rule] ||= Array(Issue).new
+          h[issue.rule] << issue
         end
       end
     end
@@ -48,9 +48,9 @@ module Ameba::Formatter
         HEADER
     end
 
-    private def rule_todo(rule, errors)
+    private def rule_todo(rule, issues)
       rule.excluded =
-        errors.map(&.location.try &.filename.try &.to_s)
+        issues.map(&.location.try &.filename.try &.to_s)
               .compact
               .uniq!
 
diff --git a/src/ameba/issue.cr b/src/ameba/issue.cr
new file mode 100644
index 00000000..3dcb7873
--- /dev/null
+++ b/src/ameba/issue.cr
@@ -0,0 +1,22 @@
+module Ameba
+  # Represents an issue reported by Ameba.
+  record Issue,
+    # A rule that triggers this issue.
+    rule : Rule::Base,
+
+    # Location of the issue.
+    location : Crystal::Location?,
+
+    # End location of the issue.
+    end_location : Crystal::Location?,
+
+    # Issue message.
+    message : String,
+
+    # Issue status.
+    status : Symbol? do
+    def disabled?
+      status == :disabled
+    end
+  end
+end
diff --git a/src/ameba/reportable.cr b/src/ameba/reportable.cr
new file mode 100644
index 00000000..8cd13491
--- /dev/null
+++ b/src/ameba/reportable.cr
@@ -0,0 +1,34 @@
+module Ameba
+  # Represents a module used to report issues.
+  module Reportable
+    # List of reported issues.
+    getter issues = [] of Issue
+
+    # Adds a new issue to the list of issues.
+    def add_issue(rule, location, end_location, message, status = nil)
+      status ||= :disabled if location_disabled?(location, rule.name)
+      issues << Issue.new rule, location, end_location, message, status
+    end
+
+    # Adds a new issue for AST *node*.
+    def add_issue(rule, node, message, **args)
+      add_issue rule, node.location, node.end_location, message, **args
+    end
+
+    # Adds a new issue for Crystal *token*.
+    def add_issue(rule, token, message, **args)
+      add_issue rule, token.location, nil, message, **args
+    end
+
+    # Adds a new issue for *location* defined by line and column numbers.
+    def add_issue(rule, location : Tuple(Int32, Int32), message, **args)
+      location = Crystal::Location.new path, *location
+      add_issue rule, location, nil, message, **args
+    end
+
+    # Returns true if the list of not disabled issues is empty, false otherwise.
+    def valid?
+      issues.reject(&.disabled?).empty?
+    end
+  end
+end
diff --git a/src/ameba/rule/base.cr b/src/ameba/rule/base.cr
index 8a8d9404..11055796 100644
--- a/src/ameba/rule/base.cr
+++ b/src/ameba/rule/base.cr
@@ -13,7 +13,7 @@ module Ameba::Rule
   # struct MyRule < Ameba::Rule::Base
   #   def test(source)
   #     if invalid?(source)
-  #       source.error self, location, "Something wrong."
+  #       issue_for line, column, "Something wrong."
   #     end
   #   end
   #
@@ -25,13 +25,13 @@ module Ameba::Rule
   #
   # Enforces rules to implement an abstract `#test` method which
   # is designed to test the source passed in. If source has issues
-  # that are tested by this rule, it should add an error.
+  # that are tested by this rule, it should add an issue.
   #
   abstract struct Base
     include Config::RuleConfig
 
     # This method is designed to test the source passed in. If source has issues
-    # that are tested by this rule, it should add an error.
+    # that are tested by this rule, it should add an issue.
     abstract def test(source : Source)
 
     def test(source : Source, node : Crystal::ASTNode, *opts)
@@ -91,6 +91,10 @@ module Ameba::Rule
       SPECIAL.includes? name
     end
 
+    macro issue_for(*args)
+      source.add_issue self, {{*args}}
+    end
+
     protected def self.rule_name
       name.gsub("Ameba::Rule::", "")
     end
diff --git a/src/ameba/rule/comparison_to_boolean.cr b/src/ameba/rule/comparison_to_boolean.cr
index ff38bfc5..6be9c923 100644
--- a/src/ameba/rule/comparison_to_boolean.cr
+++ b/src/ameba/rule/comparison_to_boolean.cr
@@ -39,7 +39,7 @@ module Ameba::Rule
 
       return unless comparison? && to_boolean?
 
-      source.error self, node.location, MSG
+      issue_for node, MSG
     end
   end
 end
diff --git a/src/ameba/rule/constant_names.cr b/src/ameba/rule/constant_names.cr
index 30cef1a0..883b8fda 100644
--- a/src/ameba/rule/constant_names.cr
+++ b/src/ameba/rule/constant_names.cr
@@ -38,7 +38,7 @@ module Ameba::Rule
         name = target.names.first
         return if (expected = name.upcase) == name
 
-        source.error self, node.location, sprintf(MSG, expected, name)
+        issue_for node, MSG % {expected, name}
       end
     end
   end
diff --git a/src/ameba/rule/debugger_statement.cr b/src/ameba/rule/debugger_statement.cr
index 1c6c76d1..ee18e862 100644
--- a/src/ameba/rule/debugger_statement.cr
+++ b/src/ameba/rule/debugger_statement.cr
@@ -27,7 +27,7 @@ module Ameba::Rule
                     node.args.empty? &&
                     node.obj.nil?
 
-      source.error self, node.location, MSG
+      issue_for node, MSG
     end
   end
 end
diff --git a/src/ameba/rule/empty_ensure.cr b/src/ameba/rule/empty_ensure.cr
index b56da975..399fa545 100644
--- a/src/ameba/rule/empty_ensure.cr
+++ b/src/ameba/rule/empty_ensure.cr
@@ -47,7 +47,7 @@ module Ameba::Rule
       node_ensure = node.ensure
       return if node_ensure.nil? || !node_ensure.nop?
 
-      source.error self, node.location, MSG
+      issue_for node, MSG
     end
   end
 end
diff --git a/src/ameba/rule/empty_expression.cr b/src/ameba/rule/empty_expression.cr
index 3b4b6ce0..2cd64415 100644
--- a/src/ameba/rule/empty_expression.cr
+++ b/src/ameba/rule/empty_expression.cr
@@ -47,12 +47,12 @@ module Ameba::Rule
 
       return if exp.nil? || exp == "nil"
 
-      source.error self, node.location, MSG % exp
+      issue_for node, MSG % exp
     end
 
     def test(source, node : Crystal::Expressions)
       if node.expressions.size == 1 && node.expressions.first.nop?
-        source.error self, node.location, MSG_EXRS
+        issue_for node, MSG_EXRS
       end
     end
   end
diff --git a/src/ameba/rule/hash_duplicated_key.cr b/src/ameba/rule/hash_duplicated_key.cr
index 828e2dae..9966aa27 100644
--- a/src/ameba/rule/hash_duplicated_key.cr
+++ b/src/ameba/rule/hash_duplicated_key.cr
@@ -34,7 +34,7 @@ module Ameba::Rule
     def test(source, node : Crystal::HashLiteral)
       return unless (keys = duplicated_keys(node.entries)).any?
 
-      source.error self, node.location, MSG % keys.join(", ")
+      issue_for node, MSG % keys.join(", ")
     end
 
     private def duplicated_keys(entries)
diff --git a/src/ameba/rule/large_numbers.cr b/src/ameba/rule/large_numbers.cr
index 3e15ac70..539c764e 100644
--- a/src/ameba/rule/large_numbers.cr
+++ b/src/ameba/rule/large_numbers.cr
@@ -42,7 +42,7 @@ module Ameba::Rule
         parsed = parse_number token.raw
 
         if allowed?(*parsed) && (expected = underscored *parsed) != token.raw
-          source.error self, token.location, MSG % expected
+          issue_for token, MSG % expected
         end
       end
     end
diff --git a/src/ameba/rule/line_length.cr b/src/ameba/rule/line_length.cr
index 7ab2ccf1..4e47e13f 100644
--- a/src/ameba/rule/line_length.cr
+++ b/src/ameba/rule/line_length.cr
@@ -22,7 +22,7 @@ module Ameba::Rule
       source.lines.each_with_index do |line, index|
         next unless line.size > max_length
 
-        source.error self, index + 1, line.size, MSG
+        issue_for({index + 1, line.size}, MSG)
       end
     end
   end
diff --git a/src/ameba/rule/literal_in_condition.cr b/src/ameba/rule/literal_in_condition.cr
index ef558e56..7d90d7b3 100644
--- a/src/ameba/rule/literal_in_condition.cr
+++ b/src/ameba/rule/literal_in_condition.cr
@@ -36,7 +36,7 @@ module Ameba::Rule
 
     def check_node(source, node)
       return unless literal?(node.cond)
-      source.error self, node.location, MSG
+      issue_for node, MSG
     end
 
     def test(source, node : Crystal::If)
diff --git a/src/ameba/rule/literal_in_interpolation.cr b/src/ameba/rule/literal_in_interpolation.cr
index 4d118ff7..93ea9c9b 100644
--- a/src/ameba/rule/literal_in_interpolation.cr
+++ b/src/ameba/rule/literal_in_interpolation.cr
@@ -32,7 +32,7 @@ module Ameba::Rule
     def test(source, node : Crystal::StringInterpolation)
       found = node.expressions.any? { |e| !string_literal?(e) && literal?(e) }
       return unless found
-      source.error self, node.location, MSG
+      issue_for node, MSG
     end
   end
 end
diff --git a/src/ameba/rule/method_names.cr b/src/ameba/rule/method_names.cr
index bb58989e..423352c7 100644
--- a/src/ameba/rule/method_names.cr
+++ b/src/ameba/rule/method_names.cr
@@ -52,7 +52,7 @@ module Ameba::Rule
     def test(source, node : Crystal::Def)
       return if (expected = node.name.underscore) == node.name
 
-      source.error self, node.location, sprintf(MSG, expected, node.name)
+      issue_for node, MSG % {expected, node.name}
     end
   end
 end
diff --git a/src/ameba/rule/negated_conditions_in_unless.cr b/src/ameba/rule/negated_conditions_in_unless.cr
index e9e4e0c0..c60bae2b 100644
--- a/src/ameba/rule/negated_conditions_in_unless.cr
+++ b/src/ameba/rule/negated_conditions_in_unless.cr
@@ -40,7 +40,7 @@ module Ameba::Rule
 
     def test(source, node : Crystal::Unless)
       return unless negated_condition? node.cond
-      source.error self, node.location, MSG
+      issue_for node, MSG
     end
 
     private def negated_condition?(node)
diff --git a/src/ameba/rule/percent_arrays.cr b/src/ameba/rule/percent_arrays.cr
index 30335490..b7d66b1d 100644
--- a/src/ameba/rule/percent_arrays.cr
+++ b/src/ameba/rule/percent_arrays.cr
@@ -34,21 +34,21 @@ module Ameba::Rule
     MSG = "Symbols `%s` may be unwanted in %s array literals"
 
     def test(source)
-      error = start_token = nil
+      issue = start_token = nil
 
       Tokenizer.new(source).run do |token|
         case token.type
         when :STRING_ARRAY_START, :SYMBOL_ARRAY_START
           start_token = token.dup
         when :STRING
-          if start_token && error.nil?
-            error = array_entry_invalid?(token.value, start_token.not_nil!.raw)
+          if start_token && issue.nil?
+            issue = array_entry_invalid?(token.value, start_token.not_nil!.raw)
           end
         when :STRING_ARRAY_END, :SYMBOL_ARRAY_END
-          if error
-            source.error(self, start_token.try &.location, error.not_nil!)
+          if issue
+            issue_for start_token.not_nil!, issue.not_nil!
           end
-          error = start_token = nil
+          issue = start_token = nil
         end
       end
     end
@@ -64,7 +64,7 @@ module Ameba::Rule
 
     private def check_array_entry(entry, symbols, literal)
       return unless entry =~ /[#{symbols}]/
-      sprintf(MSG, symbols, literal)
+      MSG % {symbols, literal}
     end
   end
 end
diff --git a/src/ameba/rule/predicate_name.cr b/src/ameba/rule/predicate_name.cr
index 7f95e227..cae038b4 100644
--- a/src/ameba/rule/predicate_name.cr
+++ b/src/ameba/rule/predicate_name.cr
@@ -45,7 +45,7 @@ module Ameba::Rule
         alternative = $2
         return unless alternative =~ /^[a-z][a-zA-Z_0-9]*$/
 
-        source.error self, node.location, sprintf(MSG, alternative, node.name)
+        issue_for node, MSG % {alternative, node.name}
       end
     end
   end
diff --git a/src/ameba/rule/rand_zero.cr b/src/ameba/rule/rand_zero.cr
index df80ed93..80b9e2cd 100644
--- a/src/ameba/rule/rand_zero.cr
+++ b/src/ameba/rule/rand_zero.cr
@@ -42,7 +42,7 @@ module Ameba::Rule
                     (value = arg.value) &&
                     (value == "0" || value == "1")
 
-      source.error self, node.location, MSG % node
+      issue_for node, MSG % node
     end
   end
 end
diff --git a/src/ameba/rule/redundant_begin.cr b/src/ameba/rule/redundant_begin.cr
index cc7f35e1..a81af866 100644
--- a/src/ameba/rule/redundant_begin.cr
+++ b/src/ameba/rule/redundant_begin.cr
@@ -71,7 +71,7 @@ module Ameba::Rule
     def test(source, node : Crystal::Def)
       return unless redundant_begin?(source, node)
 
-      source.error self, node.location, MSG
+      issue_for node, MSG
     end
 
     private def redundant_begin?(source, node)
diff --git a/src/ameba/rule/shadowed_argument.cr b/src/ameba/rule/shadowed_argument.cr
index e5b4d6bd..b1eb298b 100644
--- a/src/ameba/rule/shadowed_argument.cr
+++ b/src/ameba/rule/shadowed_argument.cr
@@ -51,7 +51,7 @@ module Ameba::Rule
       scope.arguments.each do |arg|
         next unless assign = arg.variable.assign_before_reference
 
-        source.error self, assign.location, MSG % arg.name
+        issue_for assign, MSG % arg.name
       end
     end
   end
diff --git a/src/ameba/rule/shadowed_exception.cr b/src/ameba/rule/shadowed_exception.cr
index 7af41f8b..21d18eb3 100644
--- a/src/ameba/rule/shadowed_exception.cr
+++ b/src/ameba/rule/shadowed_exception.cr
@@ -49,7 +49,7 @@ module Ameba::Rule
       return unless excs = node.rescues
 
       if (excs = shadowed excs.map(&.types)).any?
-        source.error self, node.location, MSG % excs.join(", ")
+        issue_for node, MSG % excs.join(", ")
       end
     end
 
diff --git a/src/ameba/rule/shadowing_local_outer_var.cr b/src/ameba/rule/shadowing_local_outer_var.cr
index 3f9fe164..2048f97e 100644
--- a/src/ameba/rule/shadowing_local_outer_var.cr
+++ b/src/ameba/rule/shadowing_local_outer_var.cr
@@ -54,7 +54,7 @@ module Ameba::Rule
     private def find_shadowing(source, scope)
       scope.arguments.each do |arg|
         if scope.outer_scope.try &.find_variable(arg.name)
-          source.error self, arg.location, MSG % arg.name
+          issue_for arg, MSG % arg.name
         end
       end
     end
diff --git a/src/ameba/rule/syntax.cr b/src/ameba/rule/syntax.cr
index b8c7fe90..0c57f903 100644
--- a/src/ameba/rule/syntax.cr
+++ b/src/ameba/rule/syntax.cr
@@ -23,7 +23,7 @@ module Ameba::Rule
     def test(source)
       source.ast
     rescue e : Crystal::SyntaxException
-      source.error self, e.line_number, e.column_number, e.message.to_s
+      issue_for({e.line_number, e.column_number}, e.message.to_s)
     end
   end
 end
diff --git a/src/ameba/rule/trailing_blank_lines.cr b/src/ameba/rule/trailing_blank_lines.cr
index 3b6663e7..251401bc 100644
--- a/src/ameba/rule/trailing_blank_lines.cr
+++ b/src/ameba/rule/trailing_blank_lines.cr
@@ -17,7 +17,7 @@ module Ameba::Rule
 
     def test(source)
       if source.lines.size > 1 && source.lines[-2, 2].join.strip.empty?
-        source.error self, source.lines.size, 1, MSG
+        issue_for({source.lines.size, 1}, MSG)
       end
     end
   end
diff --git a/src/ameba/rule/trailing_whitespace.cr b/src/ameba/rule/trailing_whitespace.cr
index 6ef481f6..9200110d 100644
--- a/src/ameba/rule/trailing_whitespace.cr
+++ b/src/ameba/rule/trailing_whitespace.cr
@@ -18,7 +18,7 @@ module Ameba::Rule
     def test(source)
       source.lines.each_with_index do |line, index|
         next unless line =~ /\s$/
-        source.error self, index + 1, line.size, MSG
+        issue_for({index + 1, line.size}, MSG)
       end
     end
   end
diff --git a/src/ameba/rule/type_names.cr b/src/ameba/rule/type_names.cr
index 1b274f6b..78b116bb 100644
--- a/src/ameba/rule/type_names.cr
+++ b/src/ameba/rule/type_names.cr
@@ -68,7 +68,7 @@ module Ameba::Rule
       expected = name.camelcase
       return if expected == name
 
-      source.error self, node.location, sprintf(MSG, expected, name)
+      issue_for node, MSG % {expected, name}
     end
 
     def test(source, node : Crystal::ClassDef)
diff --git a/src/ameba/rule/unless_else.cr b/src/ameba/rule/unless_else.cr
index afab396f..4c6714c6 100644
--- a/src/ameba/rule/unless_else.cr
+++ b/src/ameba/rule/unless_else.cr
@@ -56,7 +56,7 @@ module Ameba::Rule
 
     def test(source, node : Crystal::Unless)
       return if node.else.nop?
-      source.error self, node.location, MSG
+      issue_for node, MSG
     end
   end
 end
diff --git a/src/ameba/rule/unneeded_disable_directive.cr b/src/ameba/rule/unneeded_disable_directive.cr
index 02ecb7e2..4a34fa27 100644
--- a/src/ameba/rule/unneeded_disable_directive.cr
+++ b/src/ameba/rule/unneeded_disable_directive.cr
@@ -32,7 +32,7 @@ module Ameba::Rule
         next unless names = unneeded_disables(source, directive, token.location)
         next unless names.any?
 
-        source.error self, token.location, MSG % names.join(", ")
+        issue_for token, MSG % names.join(", ")
       end
     end
 
@@ -40,19 +40,19 @@ module Ameba::Rule
       return unless directive[:action] == "disable"
 
       directive[:rules].reject do |rule_name|
-        source.errors.any? do |error|
-          error.rule.name == rule_name &&
-            error.disabled? &&
-            error_at_location?(source, error, location)
+        source.issues.any? do |issue|
+          issue.rule.name == rule_name &&
+            issue.disabled? &&
+            issue_at_location?(source, issue, location)
         end && rule_name != self.name
       end
     end
 
-    private def error_at_location?(source, error, location)
-      return false unless error_line_number = error.location.try(&.line_number)
+    private def issue_at_location?(source, issue, location)
+      return false unless issue_line_number = issue.location.try(&.line_number)
 
-      error_line_number == location.line_number ||
-        ((prev_line_number = error_line_number - 1) &&
+      issue_line_number == location.line_number ||
+        ((prev_line_number = issue_line_number - 1) &&
           prev_line_number == location.line_number &&
           source.comment?(prev_line_number - 1))
     end
diff --git a/src/ameba/rule/unused_argument.cr b/src/ameba/rule/unused_argument.cr
index 0f904feb..b1bb46e3 100644
--- a/src/ameba/rule/unused_argument.cr
+++ b/src/ameba/rule/unused_argument.cr
@@ -58,7 +58,7 @@ module Ameba::Rule
         next if argument.ignored? || scope.references?(argument.variable)
 
         name_suggestion = scope.node.is_a?(Crystal::Block) ? '_' : "_#{argument.name}"
-        source.error self, argument.location, MSG % {argument.name, name_suggestion}
+        issue_for argument, MSG % {argument.name, name_suggestion}
       end
     end
   end
diff --git a/src/ameba/rule/useless_assign.cr b/src/ameba/rule/useless_assign.cr
index 1e5a4d50..3a97f68b 100644
--- a/src/ameba/rule/useless_assign.cr
+++ b/src/ameba/rule/useless_assign.cr
@@ -43,7 +43,7 @@ module Ameba::Rule
 
         var.assignments.each do |assign|
           next if assign.referenced?
-          source.error self, assign.location, MSG % var.name
+          issue_for assign, MSG % var.name
         end
       end
     end
diff --git a/src/ameba/rule/useless_condition_in_when.cr b/src/ameba/rule/useless_condition_in_when.cr
index a8652383..c8e4fbb7 100644
--- a/src/ameba/rule/useless_condition_in_when.cr
+++ b/src/ameba/rule/useless_condition_in_when.cr
@@ -48,7 +48,7 @@ module Ameba::Rule
                   .map(&.to_s)
                   .none? { |c| c == cond_s }
 
-      source.error self, cond.location, MSG
+      issue_for cond, MSG
     end
 
     def test(source)
diff --git a/src/ameba/rule/variable_names.cr b/src/ameba/rule/variable_names.cr
index 8b4dbf4e..d179280a 100644
--- a/src/ameba/rule/variable_names.cr
+++ b/src/ameba/rule/variable_names.cr
@@ -45,7 +45,7 @@ module Ameba::Rule
     private def check_node(source, node)
       return if (expected = node.name.underscore) == node.name
 
-      source.error self, node.location, sprintf(MSG, expected, node.name)
+      issue_for node, MSG % {expected, node.name}
     end
 
     def test(source, node : Crystal::Var)
diff --git a/src/ameba/rule/while_true.cr b/src/ameba/rule/while_true.cr
index 22ab5585..308f2f78 100644
--- a/src/ameba/rule/while_true.cr
+++ b/src/ameba/rule/while_true.cr
@@ -39,7 +39,7 @@ module Ameba::Rule
 
     def test(source, node : Crystal::While)
       return unless node.cond.true_literal?
-      source.error self, node.location, MSG
+      issue_for node, MSG
     end
   end
 end
diff --git a/src/ameba/runner.cr b/src/ameba/runner.cr
index d23d4693..00e3536d 100644
--- a/src/ameba/runner.cr
+++ b/src/ameba/runner.cr
@@ -52,7 +52,7 @@ module Ameba
 
     # Performs the inspection. Iterates through all sources and test it using
     # list of rules. If a specific rule fails on a specific source, it adds
-    # an error to that source.
+    # an issue to that source.
     #
     # This action also notifies formatter when inspection is started/finished,
     # and when a specific source started/finished to be inspected.
diff --git a/src/ameba/source.cr b/src/ameba/source.cr
index 3184b05b..9337f012 100644
--- a/src/ameba/source.cr
+++ b/src/ameba/source.cr
@@ -1,22 +1,9 @@
 module Ameba
   # An entity that represents a Crystal source file.
-  # Has path, lines of code and errors reported by rules.
+  # Has path, lines of code and issues reported by rules.
   class Source
     include InlineComments
-
-    # Represents an error caught by Ameba.
-    #
-    # Each error has the rule that created this error,
-    # location of the issue, message and status.
-    record Error,
-      rule : Rule::Base,
-      location : Crystal::Location?,
-      message : String,
-      status : Symbol? do
-      def disabled?
-        status == :disabled
-      end
-    end
+    include Reportable
 
     # Path to the source file.
     getter path : String
@@ -24,9 +11,6 @@ module Ameba
     # Crystal code (content of a source file).
     getter code : String
 
-    # List of errors reported.
-    getter errors = [] of Error
-
     @lines : Array(String)?
     @ast : Crystal::ASTNode?
     @fullpath : String?
@@ -43,42 +27,6 @@ module Ameba
     def initialize(@code : String, @path = "")
     end
 
-    # Adds a new error to the list of errors.
-    #
-    # ```
-    # source.error rule, location, "Line too long"
-    # ```
-    #
-    def error(rule : Rule::Base, location, message : String, status = nil)
-      status ||= :disabled if location_disabled?(location, rule.name)
-      errors << Error.new rule, location, message, status
-    end
-
-    # Adds a new error to the list of errors using line and column number.
-    #
-    # ```
-    # source.error rule, line_number, column_number, "Bad code"
-    # ```
-    #
-    def error(rule : Rule::Base, l, c, message : String, status = nil)
-      location = Crystal::Location.new path, l, c
-      error rule, location, message, status
-    end
-
-    # Indicates whether source is valid or not.
-    # Returns true if the list or errors empty, false otherwise.
-    #
-    # ```
-    # source = Ameba::Source.new code, path
-    # source.valid? # => true
-    # source.error rule, location, message
-    # source.valid? # => false
-    # ```
-    #
-    def valid?
-      errors.reject(&.disabled?).empty?
-    end
-
     # Returns lines of code splitted by new line character.
     # Since `code` is immutable and can't be changed, this
     # method caches lines in an instance variable, so calling