On 3/26/2020 6:39 PM, Ken Brown via Cygwin wrote:
> On 3/26/2020 6:01 PM, sten.kristian.ivarsson@gmail.com wrote:
>> The ENIXIO occurs when parallel child-processes simultaneously using
>> O_NONBLOCK opening the descriptor.
> 
> This is consistent with my guess that the error is generated by 
> fhandler_fifo::wait.  I have a feeling that read_ready should have been created 
> as a manual-reset event, and that more care is needed to make sure it's set when 
> it should be.
> 
>> I could provide a code-snippet
>> to reproduce it if wanted ?
> 
> Yes, please!

That might not be necessary.  If you're able to build the git repo master 
branch, please try the attached patch.

Ken