From 571f4348dd845fd4eccc6b19d93a7b422ed1a466 Mon Sep 17 00:00:00 2001 From: David Aguilar Date: Tue, 12 Oct 2021 19:45:39 -0700 Subject: [PATCH] mergetools/xxdiff: prevent segfaults from stopping difftool Users often use "git difftool HEAD^" to review their work, and have "mergetool.prompt" set to false so that difftool does not prompt them before diffing each file. This is very convenient because users can see all their diffs by reviewing the xxdiff windows one at a time. A problem occurs when xxdiff encounters some binary files. It can segfault and return exit code 128, which is special-cased by git-difftool-helper as being an extraordinary situation that aborts the process. Suppress the exit code from xxdiff in its diff_cmd() implementation when we see exit code 128 so that the GIT_EXTERNAL_DIFF loop continues on uninterrupted to the next file rather than aborting when it encounters the first binary file. Signed-off-by: David Aguilar Signed-off-by: Junio C Hamano --- mergetools/xxdiff | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mergetools/xxdiff b/mergetools/xxdiff index ce5b8e9f29..d5ce467995 100644 --- a/mergetools/xxdiff +++ b/mergetools/xxdiff @@ -3,6 +3,13 @@ diff_cmd () { -R 'Accel.Search: "Ctrl+F"' \ -R 'Accel.SearchForward: "Ctrl+G"' \ "$LOCAL" "$REMOTE" + + # xxdiff can segfault on binary files which are often uninteresting. + # Do not allow segfaults to stop us from continuing on to the next file. + if test $? = 128 + then + return 1 + fi } merge_cmd () {