TortoiseGit crashes with "git.exe diff-index --raw HEAD --numstat..."

[dezertdezine]

• I was not able to find an open or closed issue matching what I'm seeing

Setup

• Which version of Git for Windows are you using? Is it 32-bit or 64-bit?

$ git --version --build-options
git version 2.25.0.windows.1
cpu: x86_64
built from commit: 7c71c859c97853ed057da5cbab12f3c13b5554df
sizeof-long: 4
sizeof-size_t: 8

• Which version of Windows are you running? Vista, 7, 8, 10? Is it 32-bit or 64-bit?

$ cmd.exe /c ver
Microsoft Windows [Version 10.0.18363.592]

• What options did you set as part of the installation? Or did you choose the
  defaults?

# One of the following:
> type "C:\Program Files\Git\etc\install-options.txt"
> type "C:\Program Files (x86)\Git\etc\install-options.txt"
> type "%USERPROFILE%\AppData\Local\Programs\Git\etc\install-options.txt"
$ cat /etc/install-options.txt

Editor Option: VisualStudioCode
Custom Editor Path:
Path Option: Cmd
SSH Option: OpenSSH
Tortoise Option: false
CURL Option: OpenSSL
CRLF Option: CRLFAlways
Bash Terminal Option: MinTTY
Performance Tweaks FSCache: Enabled
Use Credential Manager: Enabled
Enable Symlinks: Disabled

• Any other interesting things about your environment that might be related
  to the issue you're seeing?

I'm using Git with TortoiseGit: 2.9.0

Details

• Which terminal/shell are you running Git from? e.g Bash/CMD/PowerShell/other

Bash in Vscode

• What commands did you run to trigger this issue?

From TortoiseGit:
Right-click repository folder > Select Git Commit from context menu

* I initially posted this issue on TortoiseGit / Issues here:
https://gitlab.com/tortoisegit/tortoisegit/issues/3506#note_275197630
...but was told to ask here

• What did you expect to occur after running these commands?

Normally the UI appears, I add a message and hit commit.

• What actually happened instead?

TortoiseGit error window opens with:

"git.exe diff-index --raw HEAD --numstat -C50% -M50% -z --"
exited with an error code, but did not output any error message

If I close the error window, the Tortoise UI loads with updated file, I add a message and hit commit, I get:

git did not exit cleanly (exit code -1073741795)

• If the problem was occurring with a specific repository, can you provide the
  URL to that repository to help us with testing?
  This is only happening with one repository, but it's private

If I run git from the command line with I get this:

$ git commit -a
*** stack smashing detected ***:  terminated
 *** stack smashing detected ***:  terminated
 Illegal instruction

[dscho]

Illegal instruction

Hmm, this is the first time I read anything about Git for Windows and an illegal instruction (or 0xc000001d, which is what -1073741795 translates to).

The internet suggests that the most likely cause for something like this is a corrupted binary. Can you verify the SHA-256 on your side, via

$ sha256sum /mingw64/bin/git.exe
017b2f5aa11781cd293e1c412472ed3d92d08affd945fa63bb3a633b1a98785c */mingw64/bin/git.exe

?

[dezertdezine]

I get the same as you:

$ sha256sum /mingw64/bin/git.exe
017b2f5aa11781cd293e1c412472ed3d92d08affd945fa63bb3a633b1a98785c */mingw64/bin/git.exe

[dscho]

Hmm. Any chance you can download and unpack the pdbs (from the GitHub Releases page), then run this with DrMemory or WinDbg (after familiarizing yourself with the tool)?

[dezertdezine]

Sure - I'll give it my best shot - probably be a couple of days before I can get to it, but I'll be back ;)

[dscho]

@dezertdezine if you can provide a small example which lets me try to reproduce the issue on my side, I can try to set aside some time to investigate over here, too.

[dezertdezine]

I had to give up this - too many work commitments, I couldn't dedicate any more time to it. I ended up starting a new repository omitting files that never should have been committed in the first place. In the omitted files I notices some very long mangled filenames. e.g.

I don't know whether that was the cause of the issue, but so far the new repository is working all OK.