Git 2.51.0(2) ignoring custom diff tool settings #5864
Description
Existing issues matching what you're seeing
- I was not able to find an open or closed issue matching what I'm seeing
Git for Windows version
git version 2.51.0.windows.2 cpu: x86_64 built from commit: ade1f1c136682d1bed178d573dc4dc40dca11623 sizeof-long: 4 sizeof-size_t: 8 shell-path: D:/git-sdk-64-build-installers/usr/bin/sh feature: fsmonitor--daemon libcurl: 8.16.0 OpenSSL: OpenSSL 3.5.3 16 Sep 2025 zlib: 1.3.1 SHA-1: SHA1_DC SHA-256: SHA256_BLK default-ref-format: files default-hash: sha1Windows version
Windows 11
Windows CPU architecture
x86_64 (64-bit)
Additional Windows version information
Microsoft Windows [Version 10.0.26200.6584]Options set during installation
Editor Option: VIM Custom Editor Path: Default Branch Option: Path Option: Cmd SSH Option: OpenSSH Tortoise Option: false CURL Option: WinSSL CRLF Option: CRLFAlways Bash Terminal Option: MinTTY Git Pull Behavior Option: Merge Use Credential Manager: Enabled Performance Tweaks FSCache: Enabled Enable Symlinks: Disabled Enable FSMonitor: DisabledOther interesting things
After reverting to Git 2.49.0, the expected behavior was restored, and the configured diff tools were respected.
Terminal/shell
CMD
Commands that trigger the issue
>"C:\Program Files\Git\bin\git.exe" difftool --gui --find-renames --find-copies --no-prompt "764c5b9fd3a7012f23522f697510eef471f01bad" "6dde90ec6ea14ecf343e4b5da78ef1f31b3e8e5f" -- "agent_redirection.go" This message is displayed because 'diff.tool' is not configured. See 'git difftool --tool-help' or 'git help config' for more details. 'git difftool' will now attempt to use one of the following tools: kompare emerge vimdiff nvimdiff 2 files to edit === >"C:\Program Files\Git\bin\git.exe" config get diff.tool bc4 === >"C:\Program Files\Git\bin\git.exe" config get --global diff.guitool bc4Expected behaviour
I would expect the diff to be opened using Beyond Compare 4.
Actual behaviour
The diff has opened in gvim.
Repository
No response