From 09471e564a93e927ccc9cd6e8b286d1b27ef9801 Mon Sep 17 00:00:00 2001
From: Luna <git@l4.pm>
Date: Mon, 2 Dec 2019 20:13:19 -0300
Subject: [PATCH] allow args to be deinited on error, fix argAt

---
 src/lang.zig | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/lang.zig b/src/lang.zig
index 02dbf3b..8063329 100644
--- a/src/lang.zig
+++ b/src/lang.zig
@@ -45,13 +45,14 @@ pub const Command = struct {
     }
 
     pub fn argAt(self: Command, idx: usize) ![]const u8 {
-        const args = self.args.toSliceConst();
+        std.debug.warn("{} {}", idx, self.args.len);
 
-        if (idx > (args.len - 1)) {
+        if (idx > (self.args.len - 1)) {
             std.debug.warn("Expected argument at index {}\n", idx);
             return ParseError.ArgRequired;
         }
 
+        const args = self.args.toSliceConst();
         return args[idx];
     }
 
@@ -361,6 +362,8 @@ pub const Lang = struct {
             }
 
             var args = ArgList.init(self.allocator);
+            errdefer args.deinit();
+
             while (tok_it.next()) |arg| {
                 try args.append(arg);
             }