Don't set throw data as cause [Bug #15282]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65554 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/eval.c b/eval.c
index 35255e0975..5900f22dbd 100644
--- a/eval.c
+++ b/eval.c
@@ -531,7 +531,7 @@ setup_exception(rb_execution_context_t *ec, int tag, volatile VALUE mesg, VALUE
 		    mesg = rb_obj_dup(mesg);
 		}
 	    }
-	    if (cause != Qundef) {
+	    if (cause != Qundef && !THROW_DATA_P(cause)) {
 		exc_setup_cause(mesg, cause);
 	    }
 	    if (NIL_P(bt)) {