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Date: Wed, 9 Sep 2020 23:49:30 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: /dev/p* causes shell crash in i686
Message-ID: <20200909214930.GA4127@calimero.vinschen.de>
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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.


Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer
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