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https://bugs.gentoo.org/879891
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=59905
https://git.savannah.gnu.org/cgit/diffutils.git/commit/?id=89f3daeaaf021a77177daec8666bcd80ec476833
From 89f3daeaaf021a77177daec8666bcd80ec476833 Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering@fb.com>
Date: Mon, 16 Jan 2023 15:48:10 -0800
Subject: tests: accommodate newer GNU make's SIGPIPE-ignore
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* tests/colors: Allow an exit code of not just 141 (SIGPIPE),
but also "error": 2.
Reported by Tomasz Kłoczko in http://bugs.gnu.org/59905.
--- a/tests/colors
+++ b/tests/colors
@@ -128,6 +128,9 @@ printf '%1000000s-a' > a
printf '%1000000s-b' > b
head -c 10 < fifo > /dev/null &
diff --color=always ---presume-output-tty a b > fifo
-test $? = 141 || fail=1
+
+# Depending on version of GNU make (4.3.92-4.4 set SIGPIPE to "ignore"),
+# either of these is acceptable.
+case $? in 2|141) ;; *) fail=1 ;; esac
Exit $fail
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