Bug #21180: SEGV while marking `imemo_env->iseq`

• Status: Open
• Assignee: -
• Target version: -
• Backport: 3.1: DONTNEED, 3.2: REQUIRED, 3.3: REQUIRED, 3.4: REQUIRED

[alanwu (Alan Wu)]

This issue happens most realistically for people using a fiber scheduler (through e.g. the async gem), on Ruby 3.4.x and on Linux, but the following crashes for me for 3.2 and newer on macOS:

$ tail -n +1 test.rb ret1.rb
==> test.rb <==
require 'continuation'
module Warning
  def self.warn(message)
    GC.stress = true
    callcc
  end
end
require_relative 'ret1'

==> ret1.rb <==
return 1

Keywords for people searching: rb_imemo_mark_and_move, Note that the Fiber scheduler is enabled.

Working on a fix at https://github.com/ruby/ruby/pull/12898

[alanwu (Alan Wu)]

• Description updated (diff)

[alanwu (Alan Wu)]

• Description updated (diff)