Bug #22548: Segfault after calling String#rindex repeatedly

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 4.0.5
• Backport: 3.3: REQUIRED, 3.4: REQUIRED, 4.0: REQUIRED

[rdil (Reece Dunham)]

Not sure what's going on, but this seems to be crashing our production application's Ruby instances in certain cases. I've managed to cut it down to just this minimum reproduction:

k = []; 3000.times { s = 'a' * 55; k << s; s.rindex('😀' * 4) }

I've reproduced on Ruby 3.3.13 and 4.0.5. (On macOS)

[jhawthorn (John Hawthorn)]

Looks like in master this is fixed by https://github.com/ruby/ruby/pull/18658

[rdil (Reece Dunham)]

jhawthorn (John Hawthorn) wrote in #note-1:

Looks like in master this is fixed by https://github.com/ruby/ruby/pull/18658

Just tested and that seems right! Would it be possible to get a backport for that fix to the supported release lines?

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• Backport changed from 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN to 3.3: REQUIRED, 3.4: REQUIRED, 4.0: REQUIRED

[jhawthorn (John Hawthorn)]

3.3: https://github.com/ruby/ruby/pull/19898
3.4: https://github.com/ruby/ruby/pull/19897
4.0: https://github.com/ruby/ruby/pull/19896