1 files changed, 1 insertions, 0 deletions
diff --git a/vm_eval.c b/vm_eval.c
index c67e54c5e0..0dcbafad21 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -1438,6 +1438,7 @@ 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();