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Date:	Wed, 16 Jan 2013 13:05:41 -0500
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Subject:	Re: Intermittent failures with ctrl-c
From:	Earnie Boyd <earnie AT users DOT sourceforge DOT net>
To:	cygwin AT cygwin DOT com
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On Wed, Jan 16, 2013 at 12:42 PM, Tom Honermann <thonermann AT coverity DOT com> wrote:
> On 01/16/2013 11:53 AM, marco atzeri wrote:
>>
>> On 1/16/2013 5:37 PM, Tom Honermann wrote:
>>
>>>
>>> 4) Launch mintty using an existing Cygwin installation.  Naturally, this
>>> will run a shell from the existing Cygwin install.
>>>
>>> 5) Change directories to the usr/bin directory of the snapshot.
>>>
>>
>> This will cause a cygwin1.dll collision between the two versions
>> Nothing is guarantee to work fine
>
>
> Can you elaborate?  Cygwin supports multiple installations just fine these
> days.  Use of a .bat file (an intervening cmd.exe process) should isolate
> the environments for this test.
>

While you can multiple installations you cannot mix the environments.
You did not copy mintty so you started it in one instance and then
went to another instance which will cause a clash of resources.

> Regardless, I was also able to produce a hang in bash running the same .bat
> file from a cmd.exe prompt using only the snapshot install and the copied
> bash.exe, false.exe, and dependent binaries - no mintty.  The hung bash.exe
> process eventually timed out with an error message:
>
> 5 [unknown (0x176C)] bash 2000 sig_send: wait for sig_complete event failed,
> signal 6, rc 258, Win32 error 0

Looking at the list of DLL you copied you may still be seeing a
conflict with which DLL is in use.  Do you see a hang if you remain in
usr/bin and not changing directories to your copied files?

-- 
Earnie
-- https://sites.google.com/site/earnieboyd

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