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+Fri May 17 17:34:48 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* gc.c (rb_gc_guarded_ptr): unoptimize on other compilers than gcc and
+	  msvc.
+
 Fri May 17 11:06:48 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* eval_intern.h (TH_PUSH_TAG): ensure jmpbuf to be accessible before