From 1fae7c0a69d9f80f843cddcfa03c3ac4b999df48 Mon Sep 17 00:00:00 2001
From: KOBAYASHI Shuji <shuujii@gmail.com>
Date: Tue, 29 Dec 2020 19:04:19 +0900
Subject: Refine error message from `mrb_get_arg1`

#### Before this patch:

```console
$ bin/mruby -e '{}.key?'
trace (most recent call last):
-e:1: wrong number of arguments (ArgumentError)
```

#### After this patch:

```console
$ bin/mruby -e '{}.key?'
trace (most recent call last):
-e:1: wrong number of arguments (given 0, expected 1) (ArgumentError)
```
---
 src/class.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/class.c b/src/class.c
index 92b58c3ff..bdf74e718 100644
--- a/src/class.c
+++ b/src/class.c
@@ -840,7 +840,7 @@ mrb_get_arg1(mrb_state *mrb)
     array_argv = ARY_PTR(a);
   }
   if (argc != 1) {
-    mrb_raise(mrb, E_ARGUMENT_ERROR, "wrong number of arguments");
+    mrb_argnum_error(mrb, argc, 1, 1);
   }
   return array_argv[0];
 }
-- 
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