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From:	"Rockefeller, Harry" <Harry DOT Rockefeller AT flightsafety DOT com>
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	RE: emacs-X11 freezes with mouse cut and paste
Date:	Thu, 4 Apr 2019 17:55:49 +0000
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>> It happened again.  Attached to PID as shown above.  (gdb) list gave same result as above.
>> (gdb) bt
>> #0  0x00000000773bafb1 in ntdll!DbgBreakPoint () from
>> /cygdrive/c/Windows/SYSTEM32/ntdll.dll
>> #1  0x0000000077462e08 in ntdll!DbgUiRemoteBreakin () from
>> /cygdrive/c/Windows/SYSTEM32/ntdll.dll
>> #2  0x00000000772659cd in KERNEL32!BaseThreadInitThunk () from
>> /cygdrive/c/Windows/system32/kernel32.dll
>> #3  0x000000007739a561 in ntdll!RtlUserThreadStart () from
>> /cygdrive/c/Windows/SYSTEM32/ntdll.dll
>> #4  0x0000000000000000 in ?? ()
>> Backtrace stopped: previous frame inner to this frame (corrupt stack?)
>>
>> Does this tell me the problem is not Cygwin?  Perhaps BLODA or bad hardware, maybe bad mouse?

>Send the Emacs process a USR2 signal (maybe twice).  Once Emacs displays a backtrace you can use it again.  Usually even pasting with the >mouse works after that.
>Regards,
>Achim.

Kill -s USR2 <PID>
worked.  I got the backtrace and the emacs session is responding to keyboard and mouse again.  Thanks.
I also used Ken's suggestion sending "thread 1" to gdb and then "bt".  It did give much more information
but I don't know if any of it is useful.


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