From 8b2e1ca10ecf92ad402decd6b1eab586eded0ddb Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Mon, 2 Sep 2019 16:47:12 +0900
Subject: Do not clear backtrace in Exception#exception

[Bug #15558]
---
 error.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'error.c')

diff --git a/error.c b/error.c
index 290ab7a509..2089c3787e 100644
--- a/error.c
+++ b/error.c
@@ -970,11 +970,11 @@ exc_exception(int argc, VALUE *argv, VALUE self)
 {
     VALUE exc;
 
+    argc = rb_check_arity(argc, 0, 1);
     if (argc == 0) return self;
     if (argc == 1 && self == argv[0]) return self;
     exc = rb_obj_clone(self);
-    exc_initialize(argc, argv, exc);
-
+    rb_ivar_set(exc, id_mesg, argv[0]);
     return exc;
 }
 
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