merges r30657 from trunk into ruby_1_9_2.

--
	* vm_eval.c (rb_throw_obj): add GC guard to prevent intermediate
	  variable from GC. [Bug #4322] [ruby-dev:43108]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@30897 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/vm_eval.c b/vm_eval.c
index b0718ab5f3..0afbd285d9 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -1437,6 +1437,7 @@ rb_throw_obj(VALUE tag, VALUE value)
     }
     if (!tt) {
 	VALUE desc = rb_inspect(tag);
+	RB_GC_GUARD(desc);
 	rb_raise(rb_eArgError, "uncaught throw %s", RSTRING_PTR(desc));
     }
     rb_trap_restore_mask();