Bug #17482: Ractor.receive doesnt accept Ctrl+C under some condition

• Status: Closed
• Assignee: ko1 (Koichi Sasada)
• Target version: -
• ruby -v: ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]
• Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: DONE

[riskwa (riskwa anon)]

When I run this script, Ctrl+C doesn't work.
Waiting forever on #4 is fine, but I think Ctrl+C should work.

r = Ractor.new() {
  # sleep 1                  #1
  File.open(__FILE__){  }    #2
}

# sleep 1                    #3
p Ractor.receive             #4

When I comment out #2, Ctrl+C works.
When I comment in #1 and/or #3, Ctrl+C works.
In my environment, it's reproducable in 100%.

My environment is:
WSL2 ubuntu 5 4.19.128-microsoft-standard #1 i5-10400 6core

[ko1 (Koichi Sasada)]

• Status changed from Open to Assigned
• Assignee set to ko1 (Koichi Sasada)

Thank you for the report, I could reproduce it.

[ko1 (Koichi Sasada)]

• Status changed from Assigned to Closed

Applied in changeset git|6f727853cee41195b67ee5d793c1ac23fe1a6ae0.

---

only main thread can modify vm->ubf_async_safe

vm->ubf_async_safe is VM global resource and only main thread
can manipulate it.
[Bug #17482]

[ko1 (Koichi Sasada)]

• Backport changed from 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN to 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: REQUIRED

[ko1 (Koichi Sasada)]

b2674c1fd725b43adf51af7935c780359d70c2a4 should be backported too.

[naruse (Yui NARUSE)]

• Backport changed from 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: REQUIRED to 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: DONE

ruby_3_0 9aba46d8d80473594e567dff1652626e7b2a77b0 merged revision(s) 6f727853cee41195b67ee5d793c1ac23fe1a6ae0,b2674c1fd725b43adf51af7935c780359d70c2a4.