From: ko1@...
Date: 2021-02-09T02:31:31+00:00
Subject: [ruby-core:102421] [Ruby master Bug#17612] ractor crash with some	simple codes

Issue #17612 has been updated by ko1 (Koichi Sasada).

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

Could you give me an error log?

```ruby
2.times.map{ Ractor.new{ loop{ rand.to_s } } }.each(&:take)
```

I can find an issue on the simpler example, but I also observed different error on the your original example.
I want to confirmed what error you got.

----------------------------------------
Bug #17612: ractor crash with some simple codes
https://bugs.ruby-lang.org/issues/17612#change-90293

* Author: tomanderson (Thomas Ender)
* Status: Assigned
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
I found these codes will crash because of **Ractor** :

``` ruby
    e = (1..1000).to_a
    arr = [e,e,e,e]

    arr.map { |sub_arr|
      Ractor.new(sub_arr) do |sub_arr|
        sub_arr.map {
          Digest::MD5.hexdigest(rand.to_s)
        }
      end
    }.map{|r| r.take}.reduce(:+)
```

If change e to (1..100), no crashes any more. If we don't use Ractor, it's also good.

Environment: ruby3.0.0p0 + rails6.1.1.




-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>