Exception#to_s should actually call to_s.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30531 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/error.c b/error.c
index b58f0f76d5..217740f9d9 100644
--- a/error.c
+++ b/error.c
@@ -522,9 +522,12 @@ static VALUE
 exc_to_s(VALUE exc)
 {
     VALUE mesg = rb_attr_get(exc, rb_intern("mesg"));
+    VALUE r = Qnil;
 
     if (NIL_P(mesg)) return rb_class_name(CLASS_OF(exc));
-    return rb_String(mesg);
+    r = rb_String(mesg);
+    OBJ_INFECT(r, exc);
+    return r;
 }
 
 /*