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Origin: http://www.zsh.org/mla/workers/2014/msg01250.html
http://www.zsh.org/mla/workers/2015/msg02205.html
Author: Bart Schaefer <schaefer@brasslantern.com>
Bug-Debian: https://bugs.debian.org/759870
Description: Add a sleep call which should prevent a race condition in coproc
Index: zsh/Test/A05execution.ztst
===================================================================
--- zsh.orig/Test/A05execution.ztst 2015-08-27 15:48:53.624802242 +0200
+++ zsh/Test/A05execution.ztst 2015-08-27 15:48:53.616802043 +0200
@@ -206,8 +206,9 @@
{ unsetopt MONITOR } 2>/dev/null
coproc { read -et 5 || { print -u $ZTST_fd KILLED; kill -HUP -$$ } }
print -u $ZTST_fd 'This test takes 5 seconds to fail...'
- { printf "%d\n" {1..20000} } | ( read -e )
- hang(){ printf "%d\n" {2..20000} | cat }; hang | ( read -e )
+ { printf "%d\n" {1..20000} } 2>/dev/null | ( read -e )
+ hang(){ printf "%d\n" {2..20000} | cat }; hang 2>/dev/null | ( read -e )
+ sleep 1 ;: avoid coproc exit race condition
print -p done
read -et 6 -p
0:Bug regression: piping a shell construct to an external process may hang
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