1 files changed, 1 insertions, 2 deletions
diff --git a/vm_eval.c b/vm_eval.c
index ff6ab2e2ed..91e0d1fb5d 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -1740,8 +1740,7 @@ 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_raise(rb_eArgError, "uncaught throw %"PRIsVALUE, desc);
     }
     th->errinfo = NEW_THROW_OBJECT(tag, 0, TAG_THROW);