From: Sebastian Andrzej Siewior <sebast...@breakpoint.cc>

The `cmp' command will return early if a difference is found while the
shell script is still invoking the decompressor which writes into the
closed FD. This results in SIGPIPE / exit code 141.
By ignoring SIGPIPE the real return code from `cmp' is observed which is
`1' and xzdiff exits with `1'. Without ignoring SIGPIPE the exitcode 141
is observed and xzdiff returns with `2'.

Reported to Debian BTS as #844770. Change suggested by √Čtienne Mollier√∂.

BTS: https://bugs.debian.org/844770

Signed-off-by: Sebastian Andrzej Siewior <sebast...@breakpoint.cc>
---
 src/scripts/xzdiff.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/scripts/xzdiff.in b/src/scripts/xzdiff.in
index eb7825c1dfba9..d343a889e0e52 100644
--- a/src/scripts/xzdiff.in
+++ b/src/scripts/xzdiff.in
@@ -1,4 +1,5 @@
 #!@POSIX_SHELL@
+trap '' PIPE
 
 # Copyright (C) 1998, 2002, 2006, 2007 Free Software Foundation
 # Copyright (C) 1993 Jean-loup Gailly
-- 
2.29.2


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