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Incorrect handling of multiple-byte characters in double-quote string literal Rubocop quickfix

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#4,094 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
55/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
ruby
Domain
devtools

Research direction

Start by reproducing the quickfix with the stated Style/StringLiterals configuration and a single-quoted string containing multi-byte Unicode characters. Trace the Ruby LSP handling of the RuboCop quickfix; done means the converted string preserves its Unicode content and removes the original closing single quote.

Written by the indexing model from the issue text.

Description

bug pinned
Description

Performing a quickfix on a single-quoted string literal, when a rubocop rule preferring double-quotes is active, outputs a double-quoted string with utf-8 content garbled.

Ruby LSP Information

neovim:

NVIM v0.12.3-dev-53+g0aa77cb78c
Build type: RelWithDebInfo
LuaJIT 2.1.1774638290

ruby:

ruby 3.4.7 (2025-10-08 revision 7a5688e2a2) +PRISM [x86_64-linux]

ruby-lsp: tested on 0.26.9 and 0.27.0.beta2

Reproduction steps
  • Setup rubocop in project with this rule
Style/StringLiterals:
  EnforcedStyle: single_quotes
  • Write a single quoted string containing multi-byte unicode characters
  • Perform quickfix
  • Unicode escape sequence is added and the last single-quote is not removed

https://github.com/user-attachments/assets/b163062d-b53c-413d-9e54-53acfe3d1b4b

Dominant language
Ruby
Stars
2k
Forks
281
Avg merge
1h 47m
Merged PRs (30d)
8

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