Issue #16474 has been reported by gnormhurst (Norm Hurst).

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Bug #16474: [ASYNC BUG]
https://bugs.ruby-lang.org/issues/16474

* Author: gnormhurst (Norm Hurst)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.6.4p104 (2019-08-28 revision 67798) [x86_64-cygwin]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN
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My scripting system to run thousands of video render jobs uses threading to gain parallelism. it takes about 12 hours start-to-finish. This script ran fine befoer this run that failed. Here is the message I got:

[ASYNC BUG] consume_communication_pipe: read(3)ENOENT


ruby 2.6.4p104 (2019-08-28 revision 67798) [x86_64-cygwin]

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: https://www.ruby-lang.org/bugreport.html




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