[DRE-maint] Bug#1019652: ruby-regexp-parser: FTBFS with ruby3.1: ERROR: Test "ruby3.1" failed: Failure/Error: expect(result[1]).to eq token

[Antonio Terceiro]

Source: ruby-regexp-parser
Version: 2.1.1-2
Severity: important
Justification: FTBFS
Tags: bookworm sid ftbfs
User: debian-ruby at lists.debian.org
Usertags: ruby3.1

Hi,

We are about to start the ruby3.1 transition in unstable. While trying to
rebuild ruby-regexp-parser with ruby3.1 enabled, the build failed.

Relevant part of the build log (hopefully):
>       Failure/Error: expect(result[1]).to eq token
> 
>         expected: :meta_sequence
>              got: :hex
> 
>         (compared using ==)
> 
>         Diff:
>         @@ -1 +1 @@
>         -:meta_sequence
>         +:hex
>       Shared Example Group: "scan" called from ./spec/scanner/escapes_spec.rb:55
>       # ./spec/support/shared_examples.rb:28:in `block (4 levels) in <top (required)>'
> 
> Finished in 0.91623 seconds (files took 0.29242 seconds to load)
> 1561 examples, 24 failures
> 
> Failed examples:
> 
> rspec ./spec/parser/escapes_spec.rb:59 # EscapeSequence parsing parse escape control sequence lower
> rspec ./spec/parser/escapes_spec.rb:68 # EscapeSequence parsing parse escape control sequence upper
> rspec ./spec/parser/escapes_spec.rb:77 # EscapeSequence parsing parse escape meta sequence
> rspec ./spec/parser/escapes_spec.rb:86 # EscapeSequence parsing parse escape meta control sequence
> rspec ./spec/parser/escapes_spec.rb:95 # EscapeSequence parsing parse lower c meta control sequence
> rspec ./spec/parser/escapes_spec.rb:104 # EscapeSequence parsing parse escape reverse meta control sequence
> rspec ./spec/parser/escapes_spec.rb:113 # EscapeSequence parsing parse escape reverse lower c meta control sequence
> rspec './spec/scanner/escapes_spec.rb[1:21:1]' # Escape scanning given the pattern (?-mix:a\x02c) scans token 1 as control escape at 1..4
> rspec './spec/scanner/escapes_spec.rb[1:22:1]' # Escape scanning given the pattern (?-mix:a\x1Ec) scans token 1 as control escape at 1..4
> rspec './spec/scanner/escapes_spec.rb[1:23:1]' # Escape scanning given the pattern (?-mix:a\x0A) scans token 1 as control escape at 1..5
> rspec './spec/scanner/escapes_spec.rb[1:24:1]' # Escape scanning given the pattern (?-mix:a\x1Cb) scans token 1 as control escape at 1..5
> rspec './spec/scanner/escapes_spec.rb[1:25:1]' # Escape scanning given the pattern (?-mix:a\x02c) scans token 1 as control escape at 1..5
> rspec './spec/scanner/escapes_spec.rb[1:26:1]' # Escape scanning given the pattern (?-mix:a\x1Eb) scans token 1 as control escape at 1..5
> rspec './spec/scanner/escapes_spec.rb[1:27:1]' # Escape scanning given the pattern (?-mix:a\x0Ab) scans token 1 as control escape at 1..6
> rspec './spec/scanner/escapes_spec.rb[1:28:1]' # Escape scanning given the pattern (?-mix:a\x1Cb) scans token 1 as control escape at 1..6
> rspec './spec/scanner/escapes_spec.rb[1:29:1]' # Escape scanning given the pattern (?-mix:a\x82c) scans token 1 as control escape at 1..7
> rspec './spec/scanner/escapes_spec.rb[1:30:1]' # Escape scanning given the pattern (?-mix:a\x82c) scans token 1 as control escape at 1..8
> rspec './spec/scanner/escapes_spec.rb[1:31:1]' # Escape scanning given the pattern (?-mix:a\xC2c) scans token 1 as meta_sequence escape at 1..5
> rspec './spec/scanner/escapes_spec.rb[1:32:1]' # Escape scanning given the pattern (?-mix:a\x82c) scans token 1 as meta_sequence escape at 1..7
> rspec './spec/scanner/escapes_spec.rb[1:33:1]' # Escape scanning given the pattern (?-mix:a\x9E) scans token 1 as meta_sequence escape at 1..7
> rspec './spec/scanner/escapes_spec.rb[1:34:1]' # Escape scanning given the pattern (?-mix:a\x8A) scans token 1 as meta_sequence escape at 1..8
> rspec './spec/scanner/escapes_spec.rb[1:35:1]' # Escape scanning given the pattern (?-mix:a\x9C) scans token 1 as meta_sequence escape at 1..8
> rspec './spec/scanner/escapes_spec.rb[1:36:1]' # Escape scanning given the pattern (?-mix:a\x82c) scans token 1 as meta_sequence escape at 1..8
> rspec './spec/scanner/escapes_spec.rb[1:37:1]' # Escape scanning given the pattern (?-mix:a\x9C) scans token 1 as meta_sequence escape at 1..9
> 
> /usr/bin/ruby3.1 -I/usr/share/rubygems-integration/all/gems/rspec-support-3.10.3/lib:/usr/share/rubygems-integration/all/gems/rspec-core-3.10.1/lib /usr/share/rubygems-integration/all/gems/rspec-core-3.10.1/exe/rspec --pattern ./spec/\*\*/\*_spec.rb --format documentation failed
> ERROR: Test "ruby3.1" failed: 


The full build log is available from:
https://people.debian.org/~terceiro/ruby3.1/17/ruby-regexp-parser/ruby-regexp-parser_2.1.1-2+rebuild1663008118_amd64-2022-09-12T18:41:59Z.build

To reproduce this, you need to install ruby-all-dev >= 1:3.0+2. Depending on
when you try this, it might mean installing ruby-all-dev from experimental, or
if the transition has already started, a normal build on unstable will be
enough.  If you fail to reproduce, please provide a build log and diff it with
mine so that we can identify if something relevant changed in the meantime.

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

If you reassign this bug to another package, please marking it as 'affects'-ing
this package. See https://www.debian.org/Bugs/server-control#affects
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