Hi folks It looks like git crashes if diff.external is set and the user compares files that have different permissions. Here's a repro: $ mkdir demo $ cd demo $ git init . Initialized empty Git repository in /tmp/demo/.git/ $ git config diff.external /bin/echo $ touch foo bar $ chmod 755 foo $ git diff --no-ext-diff --no-index foo bar diff --git 1/foo 2/bar old mode 100755 new mode 100644 $ git diff --no-index foo bar zsh: segmentation fault (core dumped) git diff --no-index foo bar This was originally reported as a difftastic bug[1] but it seems to occur regardless of the value of diff.external, hence my repro with /bin/echo. [1] https://github.com/Wilfred/difftastic/issues/615 [System Info] git version: git version 2.43.0 cpu: x86_64 no commit associated with this build sizeof-long: 8 sizeof-size_t: 8 shell-path: /bin/sh uname: Linux 6.7.0-zen3-1-zen #1 ZEN SMP PREEMPT_DYNAMIC Sat, 13 Jan 2024 14:36:54 +0000 x86_64 compiler info: gnuc: 13.2 libc info: glibc: 2.38 $SHELL (typically, interactive shell): /bin/zsh Thanks Wilfred
