From f6896751b454451fe05636d9d8b4f80eb191fd9c Mon Sep 17 00:00:00 2001
From: Tomoyuki Sahara <tsahara@iij.ad.jp>
Date: Thu, 2 Nov 2017 15:44:05 +0900
Subject: don't overwrite backtrace info.

---
 src/error.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/error.c')

diff --git a/src/error.c b/src/error.c
index fd4182eb2..a9b6db07a 100644
--- a/src/error.c
+++ b/src/error.c
@@ -200,6 +200,7 @@ exc_debug_info(mrb_state *mrb, struct RObject *exc)
   mrb_callinfo *ci = mrb->c->ci;
   mrb_code *pc = ci->pc;
 
+  if (mrb_obj_iv_defined(mrb, exc, mrb_intern_lit(mrb, "file"))) return;
   while (ci >= mrb->c->cibase) {
     mrb_code *err = ci->err;
 
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