# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 1333403218 18000
# Node ID fb765286f2f99769b2fb40ad0960ffe5f3ddff87
# Parent  7e24d34837a91fd44076b4c38532f9814925d2ac
tests: avoid zombie lockup with test-hup

The 'while kill -0' recipe can cause a livelock if the process we're waiting
to die is a normal child process. If it becomes a zombie that the shell
doesn't reap (shell bug?), it will continue to be able to accept
signals. So instead, we just wait(1).

diff -r 7e24d34837a9 -r fb765286f2f9 tests/test-hup.t
--- a/tests/test-hup.t	Mon Apr 02 16:04:07 2012 -0500
+++ b/tests/test-hup.t	Mon Apr 02 16:46:58 2012 -0500
@@ -15,7 +15,7 @@
   > kill -HUP $P
   > ) > p
 
-  $ while kill -0 $P 2>/dev/null; do true; done
+  $ wait
   $ cat out
   0
   0