Git hook stuck on certain commit message

[l2dy]

What did you expect to happen?

When I commit with the following commit message in ~/.emacs.d, the commit-msg hook installed by Doom should exit in a reasonable time and give proper feedback.

tweak(cc): default to +lsp

Without +lsp, both irony-mode and rtags require separate configuration
for system header path on macOS.

See:
* https://github.com/Sarcasm/irony-mode/wiki/Mac-OS-X-issues-and-workaround
* https://github.com/Andersbakken/rtags/issues/811

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# ...

What actually happened?

doom --nocolor ci hook-commit-msg .git/COMMIT_EDITMSG stuck and consumes 100% CPU.

Describe your attempts to resolve the issue

I tried downgrading to Emacs 28 with and without nativecomp, but it still stuck.

Steps to reproduce

1. Open Emacs 28.0.91 with nativecomp.
2. Modify init.example.el.
3. Open magit buffer and try to commit with the above commit message.
4. Magit says "Message saved", but the commit is not created.
5. /Applications/MacPorts/Emacs.app/Contents/MacOS/Emacs --no-site-file --script /Users/xxx/.emacs.d/bin/doom -- --nocolor ci hook-commit-msg .git/COMMIT_EDITMSG consumes 100% CPU and does not exit in a reasonable amount of time.

System Information

https://pastebin.com/jHN5H9am

[hlissner]

I can reproduce this. I'll look into it soon. While we wait, this will work:

tweak(cc): default to +lsp

Without +lsp, both irony-mode and rtags require separate configuration
for system header path on macOS.

Ref: https://github.com/Sarcasm/irony-mode/wiki/Mac-OS-X-issues-and-workaround
Ref: Andersbakken/rtags#811

In any case, Ref: commit trailers are our convention for external references.