From bf075b9e0d55ffc36a5beaa64b1b3838d20fa57f Mon Sep 17 00:00:00 2001
From: "Barton E. Schaefer" <schaefer@zsh.org>
Date: Wed, 17 Dec 2014 21:12:42 -0800
Subject: 33992: do not attempt attachtty() for process group zero (which is
 possible in a linux pid namespace)

---
 Src/jobs.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'Src/jobs.c')

diff --git a/Src/jobs.c b/Src/jobs.c
index 8c4254ad1..c6e1bce15 100644
--- a/Src/jobs.c
+++ b/Src/jobs.c
@@ -2779,8 +2779,11 @@ void
 release_pgrp(void)
 {
     if (origpgrp != mypgrp) {
-	attachtty(origpgrp);
-	setpgrp(0, origpgrp);
+	/* in linux pid namespaces, origpgrp may never have been set */
+	if (origpgrp) {
+	    attachtty(origpgrp);
+	    setpgrp(0, origpgrp);
+	}
 	mypgrp = origpgrp;
     }
 }
-- 
cgit 1.4.1