Bug #4266: Timeouts in threads cause "ThreadError: deadlock; recursive lo= cking" http://redmine.ruby-lang.org/issues/show/4266 Author: Christopher Bottaro Status: Open, Priority: Normal Category: core, Target version: 1.9.2 ruby -v: ruby 1.9.2p136 (2010-12-25 revision 30365) [x86_64-darwin10.6.0]= Run the attached file (or this pastie http://pastie.org/1448542) a few ti= mes and you'll eventually get: ThreadError: deadlock; recursive locking: <internal:prelude>:8:in `lock' <internal:prelude>:8:in `synchronize' bin/deadlock_test.rb:86:in `block (4 levels) in <main>' /Users/cjbottaro/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/timeout.rb:57= :in `timeout' bin/deadlock_test.rb:85:in `block (3 levels) in <main>' bin/deadlock_test.rb:83:in `times' bin/deadlock_test.rb:83:in `block (2 levels) in <main>' I've had the script run successfully over 5 times in a row before getting= the errors, so if it doesn't happen the first few times... keep trying. The problem doesn't happen in 1.8.7 or Jruby, but does happen in 1.9.1. ---------------------------------------- http://redmine.ruby-lang.org cmVxdWlyZSAidGhyZWFkIgpyZXF1aXJlICJ0aW1lb3V0IgoKZGVmIGNhbGNf ZmliKG4pCiAgaWYgbiA9PSAwCiAgICAwCiAgZWxzaWYgbiA9PSAxCiAgICAx CiAgZWxzZQogICAgY2FsY19maWIobi0xKSArIGNhbGNfZmliKG4tMikKICBl bmQKZW5kCgpsb2NrID0gTXV0ZXgubmV3Cgp0aHJlYWRzID0gMjAudGltZXMu Y29sbGVjdCBkbwogIFRocmVhZC5uZXcgZG8KICAgIDIwLnRpbWVzIGRvCiAg ICAgIGJlZ2luCiAgICAgICAgVGltZW91dC50aW1lb3V0KDAuMjUpIGRvCiAg ICAgICAgICBsb2NrLnN5bmNocm9uaXpleyBjYWxjX2ZpYigxMDAwKSB9CiAg ICAgICAgZW5kCiAgICAgIHJlc2N1ZSBUaHJlYWRFcnJvciA9PiBlCiAgICAg ICAgcHV0cyAiI3tlLmNsYXNzfTogI3tlLm1lc3NhZ2V9OlxuIiArIGUuYmFj a3RyYWNlLmpvaW4oIlxuIikgKyAiXG5cbiIKICAgICAgcmVzY3VlIFRpbWVv dXQ6OkVycm9yID0+IGUKICAgICAgICAjcHV0cyBlLmNsYXNzCiAgICAgICAg bmlsCiAgICAgIGVuZAogICAgZW5kCiAgZW5kCmVuZAoKdGhyZWFkcy5lYWNo eyB8dHwgdC5qb2luIH0=