master ef17ba8370: ; Fix a race condition in an Eshell test

[Jim Porter]

branch: master
commit ef17ba83709794fe0342743397f0e68b90ea1f69
Author: Jim Porter <jporterbugs@gmail.com>
Commit: Jim Porter <jporterbugs@gmail.com>

    ; Fix a race condition in an Eshell test
    
    * test/lisp/eshell/esh-proc-tests.el
    (esh-proc-test/sigpipe-exits-process): Use "|&" when creating the
    pipeline to prevent an extra pipe process from being started.
---
 test/lisp/eshell/esh-proc-tests.el | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/test/lisp/eshell/esh-proc-tests.el 
b/test/lisp/eshell/esh-proc-tests.el
index 52a0d1eeeb..abe363bee0 100644
--- a/test/lisp/eshell/esh-proc-tests.el
+++ b/test/lisp/eshell/esh-proc-tests.el
@@ -128,8 +128,10 @@
    (eshell-match-command-output
     ;; The first command is like `yes' but slower.  This is to prevent
     ;; it from taxing Emacs's process filter too much and causing a
-    ;; hang.
-    (concat "sh -c 'while true; do echo y; sleep 1; done' | "
+    ;; hang.  Note that we use "|&" to connect the processes so that
+    ;; Emacs doesn't create an extra pipe process for the first "sh"
+    ;; invocation.
+    (concat "sh -c 'while true; do echo y; sleep 1; done' |& "
             "sh -c 'read NAME; echo ${NAME}'")
     "y\n")
    (eshell-wait-for-subprocess t)