the argument for Exception.new is optinal

fae483ff · Yukihiro Matsumoto · e3c1b48b · fae483ff
Commit fae483ff authored May 31, 2012 by Yukihiro Matsumoto
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src/error.c src/error.c +3 -3

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--- a/src/error.c
+++ b/src/error.c
@@ -56,9 +56,9 @@ exc_initialize(mrb_state *mrb, mrb_value exc)
 {
  mrb_value mesg;

-  mrb_get_args(mrb, "o", &mesg);
-  mrb_iv_set(mrb, exc, mrb_intern(mrb, "mesg"), mesg);
-
+  if (mrb_get_args(mrb, "|o", &mesg) == 1) {
+    mrb_iv_set(mrb, exc, mrb_intern(mrb, "mesg"), mesg);
+  }
  return exc;
 }