[ruby-core:120436] [Ruby master Bug#20989] Segmentation fault in Ripper when lexing `/#{"\xcd"}/`
From:
"nobu (Nobuyoshi Nakada) via ruby-core" <ruby-core@...>
Date:
2024-12-28 04:11:55 UTC
List:
ruby-core #120436
Issue #20989 has been updated by nobu (Nobuyoshi Nakada).
Backport changed from 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN to 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: REQUIRED
commit:0ccc765 may be needed to backport to all versions.
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Bug #20989: Segmentation fault in Ripper when lexing `/#{"\xcd"}/`
https://bugs.ruby-lang.org/issues/20989#change-111213
* 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: REQUIRED
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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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