From 47d7cce66dc79235509130bcfc5ca0d32c21337b Mon Sep 17 00:00:00 2001
From: Yukihiro Matz Matsumoto <matz@ruby-lang.org>
Date: Sat, 26 Jan 2013 00:17:40 +0900
Subject: inspecting anonymous class should not SEGV; close #780

---
 src/class.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src/class.c')

diff --git a/src/class.c b/src/class.c
index b24dd8a08..530fc5ce4 100644
--- a/src/class.c
+++ b/src/class.c
@@ -1211,7 +1211,12 @@ const char*
 mrb_class_name(mrb_state *mrb, struct RClass* c)
 {
   mrb_value path = mrb_class_path(mrb, c);
-  if (mrb_nil_p(path)) return 0;
+  if (mrb_nil_p(path)) {
+    char buf[32];
+
+    snprintf(buf, 32, "#<Class:%p>", c);
+    path = mrb_str_new_cstr(mrb, buf);
+  }
   return mrb_str_ptr(path)->ptr;
 }
 
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