Bug #21505: [Ractor] calling exit from non-main ractor will hang if main ractor waits on it

• Status: Open
• Assignee: ractor
• Target version: -
• Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN

[luke-gru (Luke Gruber)]

r = Ractor.new do
  exit
end

r.join # hangs

Should exit be allowed in ractors? It would be easiest to disallow, as the code might be tricky if we allow it.

[Eregon (Benoit Daloze)]

Kernel#exit is basically just raise SystemExit, does it mean any exception in a Ractor hangs?
IOW, I don't think it should be disallowed because exit is just an Exception.

[luke-gru (Luke Gruber)]

Yeah fair enough. It's probably not as complicated to fix as I initially thought.