https://github.com/st0012/debug-freeze-issue

https://github.com/st0012/debug-freeze-issue

Last synced: 7 days ago
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• Host: GitHub
• URL: https://github.com/st0012/debug-freeze-issue
• Owner: st0012
• Created: 2022-12-23T17:26:02.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2022-12-23T17:36:58.000Z (about 2 years ago)
• Last Synced: 2024-11-15T09:52:06.137Z (about 2 months ago)
• Language: Ruby
• Size: 22.5 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Debugger Frozen With Timeout Issue Repro

## Steps

1. Run `bundle install`

1. Run `bundle exec rails s`

1. Visit `http://localhost:3000/` in the browser

1. Once inside the breakpoint, execute the `timeout` method in the console, which should print `Timeout.timeout`

1. Type `timeout` again. But this time, `Timeout.timeout` wouldn't be printed and the debugger just freezes

```

Processing by HelloController#hello as HTML

[1, 10] in ~/projects/debug-freeze-issue/app/controllers/hello_controller.rb

     1| class HelloController < ApplicationController

     2|   def hello

     3|     Timeout.timeout(3600) do

=>   4|       binding.b

     5|     end

     6|   end

     7|

     8|   def timeout

     9|     Timeout.timeout(1) { puts "Timeout.timeout" }

    10|   end

=>#0    block in hello at ~/projects/debug-freeze-issue/app/controllers/hello_controller.rb:4

  #1    block {|exc=#|} in timeout at ~/.gem/ruby/3.1.2/gems/timeout-0.3.1/lib/timeout.rb:189

  # and 81 frames (use `bt' command for all frames)

(rdbg) timeout

Timeout.timeout

nil

(rdbg) timeout

# just freezes from here

```

### Notes

- Occasionally it'd work fine (1 in 5~6 tries), but most of the time it'd freeze.

- Hit Arrrow Up a few times inside the console could also reproduce it.

    - This is because that key triggers the `reline` library's call, which uses `Timeout.timeout` underneath.

    ```

    [1, 10] in ~/projects/debug-freeze-issue/app/controllers/hello_controller.rb

        1| class HelloController < ApplicationController

        2|   def hello

        3|     Timeout.timeout(3600) do

    =>   4|       binding.b

        5|     end

        6|   end

        7|

        8|   def timeout

        9|     Timeout.timeout(1) { puts "Timeout.timeout" }

        10|   end

    =>#0    block in hello at ~/projects/debug-freeze-issue/app/controllers/hello_controller.rb:4

    #1    block {|exc=#|} in timeout at ~/.gem/ruby/3.1.2/gems/timeout-0.3.1/lib/timeout.rb:189

    # and 81 frames (use `bt' command for all frames)

    (ruby) q!^[[A^[[A^[[A

    # freezes

    ```