Valid regex seemingly fails silently?

[ChasNelson1990]

Hi there.
Just started using this action so if I'm doing something silly please let me know but I can't seem to get valid parenthesis-related regex statements working in my labeler.yml.

PR title is: "build(deps): apply minor and patch dependency updates test" - we use both "^build(deps): ." and "^build(dev-deps): ." commit and PR title tags and I'd like to catch both and apply a "dependencies" label.

The following labeler.yml catches that PR title and succesfully applies the label:

version: v1

labels:
  - label: "dependencies"
    sync: true
    matcher:
      title: "^build.*"
      commits: "^build.*"

However, to use parentheses I am obviously going to have to escape them. \( isn't valid YAML so I went for \x28 instead and came up with the following valid regex:

title: "^build\x28(deps|deps-dev)\x29: .*"

However, the action then does nothing - officially passed but gives no useful logging output and doesn't apply the label.

Is there a debug flag for getting useful logging? And should valid regex like this work?

Any help much appreciated.

[baptiste0928]

Had the same issue, escaping the backslash with another one worked:

 title: "^build\\(deps|deps-dev\\): .*"