From b050cc5ab9b0774bbd16f49f4787f50b07c566fe Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 10 Nov 2013 13:16:33 +0000
Subject: error.c: Exception#cause

* error.c (exc_cause): captured previous exception.
* eval.c (make_exception): capture previous exception automagically.
  [Feature #8257]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43636 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 eval.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'eval.c')

diff --git a/eval.c b/eval.c
index cbe1206486..a398479fb2 100644
--- a/eval.c
+++ b/eval.c
@@ -641,6 +641,10 @@ make_exception(int argc, VALUE *argv, int isstr)
 	if (argc > 2)
 	    set_backtrace(mesg, argv[2]);
     }
+    {
+	VALUE cause = get_errinfo();
+	if (!NIL_P(cause)) rb_iv_set(mesg, "cause", cause);
+    }
 
     return mesg;
 }
-- 
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