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On 01/05/2015 13:43, Ken Brown wrote:
On 5/1/2015 7:56 AM, Jon TURNEY wrote:On 30/04/2015 23:19, Ken Brown wrote:On 4/29/2015 1:26 PM, Jon TURNEY wrote:The following packages have been updated in the Cygwin distribution: *** xorg-server-*1.17.1-3I'm finding, on three different 64-bit Cygwin systems, that the server dies shortly after starting. I'm attaching XWin.0.log from one of them. The log from a 32-bit Cygwin install on the same machine starts the same but then continues with [440201.140] winPointerWarpCursor - Discarding first warp: 640 512 [440201.140] (--) 8 mouse buttons found [440201.140] (--) Setting autorepeat to delay=500, rate=31 [...] The problem goes away if I revert to 1.17.1-2. Let me know if there's further information that I can provide.That is rather mysterious and disappointing. I can't reproduce this. Does this occur if you run XWin directly?Yes.If so, could you perhaps upload a strace somewhere, please?http://sanibeltranquility.com/cygwin/xwin.trace.xz
Thanks. This ends with ... --- Process 2996, exception c0000005 at 0000000180155C82 and... $ addr2line -e /usr/lib/debug/usr/bin/cygwin1.dbg 0x0000000180155C82 /usr/src/debug/cygwin-2.0.1-1/winsup/cygwin/malloc.cc:4753 ... which is somewhere inside free().I don't quite understand why cygwin's exception processing doesn't then catch that exception and raise a SIGSEGV.
However, I did a bit more staring at the changes in 1.17.1-3 and I did find a nasty bug in some code which uses the heap. I've uploaded a snapshot [1] with a possible fix, please test that if you can.
[1] ftp://cygwin.com/pub/cygwinx/x86_64/XWin.20150501-git-b17931db63a48948.exe.bz2
-- Jon TURNEY Volunteer Cygwin/X X Server maintainer -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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