diff --git a/.gitignore b/.gitignore
index 44f7213..346c11d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 zig-cache/
+zig-out/
 *.mp3
 *.wav
 build_runner.zig
diff --git a/src/image.zig b/src/image.zig
index 073ffc4..45aa6da 100644
--- a/src/image.zig
+++ b/src/image.zig
@@ -161,7 +161,7 @@ pub const Image = struct {
         var in_fmt = mkSfInfo();
         // clone sndfile
         var sndfile = try sopen(self.allocator, self.curpath, c.SFM_READ, &in_fmt);
-        std.testing.expectEqual(self.frames, @intCast(usize, in_fmt.frames));
+        std.debug.assert(self.frames == @intCast(usize, in_fmt.frames));
 
         var image = try self.allocator.create(Image);
 
diff --git a/src/main.zig b/src/main.zig
index 9045304..ee269c1 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -41,7 +41,7 @@ fn copyCommandToHeap(allocator: std.mem.Allocator, command: langs.Command, compt
 pub fn doRepl(allocator: std.mem.Allocator, args_it: anytype) !void {
     var stdout_file = std.io.getStdOut();
     const stdout = &stdout_file.writer();
-    const scri_path = try (args_it.next(allocator) orelse @panic("expected scri path"));
+    const scri_path = (args_it.next() orelse @panic("expected scri path"));
     errdefer allocator.free(scri_path);
     defer allocator.free(scri_path);
 
@@ -246,8 +246,7 @@ fn doRun(allocator: std.mem.Allocator, args_it: anytype) !void {
     var runner = runners.Runner.init(allocator, false);
     defer runner.deinit();
 
-    const scri_path = try (args_it.next(allocator) orelse @panic("run: expected scri path"));
-    defer allocator.free(scri_path);
+    const scri_path = (args_it.next() orelse @panic("run: expected scri path"));
 
     var file = try std.fs.cwd().openFile(scri_path, .{});
     defer file.close();
@@ -270,18 +269,18 @@ pub fn main() !void {
     defer {
         _ = allocator_instance.deinit();
     }
-    const allocator = &allocator_instance.allocator;
+    const allocator = allocator_instance.allocator();
 
-    var args_it = std.process.args();
+    var args_it = try std.process.argsWithAllocator(allocator);
+    defer args_it.deinit();
 
     _ = args_it.skip();
-    const cli_command_opt = args_it.next(allocator);
+    const cli_command_opt = args_it.next();
     if (cli_command_opt == null) {
         return doHelp();
     }
 
-    const cli_command = try cli_command_opt.?;
-    defer allocator.free(cli_command);
+    const cli_command = cli_command_opt.?;
 
     if (std.mem.eql(u8, cli_command, "help")) {
         return doHelp();