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Subject: Re: /dev/p* causes shell crash in i686
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From: Ken Brown via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Ken Brown <kbrown AT cornell DOT edu>
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On 9/10/2020 3:15 PM, Andrew Schulman via Cygwin wrote:
>> On Sep  9 08:08, Andrew Schulman via Cygwin wrote:
>>> Here's a strange one. In bash in i686, try to run:
>>>
>>> ls /dev/ptmx
>>>
>>> I only get about as far as:
>>>
>>> ls /dev/p
>>>
>>> and then my terminal window vanishes. This happens:
>>>
>>> * In fish or bash.
>>> * On two different hosts that I've tried.
>>> * In mintty or a system terminal. In the system terminal, sometimes the
>>> command works normally the first time, but fails the 2nd time; or I have to
>>> press <TAB> after `ls /dev/p`, then the terminal vanishes.
>>> * With other commands that treat their arguments as files, not text. So for
>>> example, I can't finish typing `cat /dev/ptmx` or `test -r /dev/ptmx`
>>> before the terminal window vanishes, but `echo /dev/ptmx` works normally.
>>>
>>> It doesn't happen:
>>>
>>> * In x86_64 - only i686.
>>> * In scripts - only interactively.
>>>
>>> Is anyone else able to reproduce this? I've tried to capture an strace log,
>>> but I've failed so far. The strace seems to stop the crash. Still trying.
>>>
>>> I thought this could be a BLODA problem, but the two hosts I tried are
>>> running different virus scanners (McAfee and Windows Defender).
>>>
>>> Cygwin 3.1.7-1, all packages up-to-date. Output of cygcheck -svr attached.
>>>
>>> Andrew
>>
>> I think I fixed it.  I just uploaded new developer snapshots to
>> https://cygwin.com/snapshots/  Please give them a try.
> 
> When I substitute cygwin1-20090909.dll for cygwin1.dll in i686, I can't run
> any commands. They all give "The application was unable to start correctly
> (0xc0000022)". Anything different I should be doing?

Check the permissions on cygwin1-20090909.dll.  Is it executable?

Ken
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