[ruby-core:121003] [Ruby master Bug#20989] Segmentation fault in Ripper when lexing `/#{"\xcd"}/`
From:
"k0kubun (Takashi Kokubun) via ruby-core" <ruby-core@...>
Date:
2025-02-14 01:50:35 UTC
List:
ruby-core #121003
Issue #20989 has been updated by k0kubun (Takashi Kokubun).
Backport changed from 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: REQUIRED to 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: DONE
ruby_3_4 commit:5ba052675f0eefe77dd7ab30bb9ac186f8d82ccb merged revision(s) commit:fb18bb183c24ca82b8f114ed090d62bd69b5df84.
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Bug #20989: Segmentation fault in Ripper when lexing `/#{"\xcd"}/`
https://bugs.ruby-lang.org/issues/20989#change-111911
* Author: Earlopain (Earlopain _)
* Status: Closed
* ruby -v: ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [x86_64-linux]
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: DONE
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When I paste this code snippet into irb, I get a segfault: `/#{"\xcd"}/`. Current master (https://github.com/ruby/ruby/commit/adbbc9109ee71848204b5168a7c1bf604849e5fa) also fails.
Here is a simple reproduction, I attached the full bug as an attachment:
```rb
require "ripper"
lexer = Ripper::Lexer.new('/#{"\xcd"}/', '-', 0)
lexer.scan.each
# => /home/earlopain/.rbenv/versions/3.4.1/lib/ruby/3.4.0/ripper/lexer.rb:177: [BUG] Segmentation fault at 0x0000000000000008
# => ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [x86_64-linux]
```
---Files--------------------------------
bug.txt (27.2 KB)
--
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