bat panics on Ruby files with unindented heredocs

[sharkdp]

When calling bat on this Ruby file

<<END_DESC
Test
END_DESC

it panics with:

thread 'main' panicked at
  'regex string should be pre-tested: Error(-208, invalid backref number/name)',
  …/syntect-4.1.0/src/parsing/regex.rs:70:17

found with the Python script in #913.

[sharkdp]

This is caused by the block here: https://github.com/sublimehq/Packages/blob/f36b8f807d5f30d2b8ef639232a9fc5960f550fa/Ruby/Ruby.sublime-syntax#L1914-L1917

  unindented-heredoc-end:
    - match: ^\1$ # HEREDOC delimiter
      scope: string.unquoted.heredoc.ruby punctuation.definition.string.end.ruby
      pop: true

This block seems to reference the heredoc name from the opening part

  heredoc-ruby:
    - match: <<[-~]["`]?({{heredoc_type_ruby}})["`]?
      scope: string.unquoted.heredoc.ruby punctuation.definition.string.begin.ruby
      push: [heredoc-ruby-indented-interpolated, trailing-heredoc-start]
    - match: <<[-~]'({{heredoc_type_ruby}})'
      scope: string.unquoted.heredoc.ruby punctuation.definition.string.begin.ruby
      push: [heredoc-ruby-indented-literal, trailing-heredoc-start]
    - match: <<["`]?({{heredoc_type_ruby}})["`]?
      scope: string.unquoted.heredoc.ruby punctuation.definition.string.begin.ruby
      push: [heredoc-ruby-unindented-interpolated, trailing-heredoc-start]
    - match: <<'({{heredoc_type_ruby}})'
      scope: string.unquoted.heredoc.ruby punctuation.definition.string.begin.ruby
      push: [heredoc-ruby-unindented-literal, trailing-heredoc-start]

but for some reason, the \1 reference can not be resolved.

[keith-hall]

this looks like an instance of trishume/syntect#104 to me

[sharkdp]

Certainly seems like it - thank you for the reference!

[sharkdp]

closed via #929