"No live threads left" with Timeout

[mahemoff]

I'm not sure if this is a byebug issue, but it seems there's some issue with threads or Timeout library.

It comes up in minitest based unit testing, where if I run a series of tests and debug one of them, the others all have a timeout-related error. Also in libraries using timeout, such as some HTTP clients. If I try to run the library in byebug command line, it throws this exception.

[1, 5] in ./test.rb
   1: #!/usr/bin/env ruby
   2: require 'byebug'
   3: require 'timeout'
   4: byebug
=> 5: true

(byebug) Timeout::timeout(1) {}
WARNING: No backtrace available!!/home/project/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb:95:in `join': No live threads left. Deadlock? (fatal)
        from /home/project/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb:95:in `ensure in block in timeout'
        from /home/project/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb:95:in `block in timeout'
        from /home/project/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb:35:in `block in catch'
        from /home/project/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb:35:in `catch'
        from /home/project/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb:35:in `catch'
        from /home/project/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb:106:in `timeout'
        from ./test.rb:5:in `<main>'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/command.rb:114:in `eval'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/command.rb:114:in `bb_warning_eval'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/commands/eval.rb:29:in `block in execute'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/commands/eval.rb:7:in `run_with_binding'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/commands/eval.rb:25:in `execute'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:198:in `one_cmd'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:179:in `block (2 levels) in process_commands'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:178:in `each'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:178:in `block in process_commands'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:171:in `catch'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:171:in `process_commands'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:89:in `at_line'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:49:in `block in at_line'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:47:in `synchronize'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/processors/command_processor.rb:47:in `at_line'
        from /home/project/.rvm/gems/ruby-2.1.1/gems/byebug-3.1.2/lib/byebug/context.rb:78:in `at_line'
        from ./test.rb:5:in `<main>'

[deivid-rodriguez]

Closing cause this seems a duplicate of #54

Thanks anyways!!

[mahemoff]

Ah, sorry. I just did a search for threads in subject. Thanks for looking into it there.

[deivid-rodriguez]

No worries!