python crash under cygwin 1.5.9 dll

python crash under cygwin 1.5.9 dll

[Jordan Gannett]

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Recently I tried upgrading to the cygwin-1.5.9-1
package, and after that, BitTorrent (a python-based
program) started crashing consistently on certain
inputs, with the error

segmentation fault (core dumped)

I tried downgrading back to 1.5.7, and then the
problems disappeared. I tried 1.5.8 also, and that has
the same crash as 1.5.9, so I'd guess it has something
to do with changes starting in that release.

I've attached the python stack dump for one such
crash, though I don't know if it'll help much. I had
trouble googling for any useful information on how to
interpret such stack dumps.

I also tried running the program within gdb, and oddly
enough, the crash doesn't seem to happen in that case.
If there is potentially useful information I've
neglected to mention, please let me know. Thanks.


	
		
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[-- Attachment #2: python2.3.exe.stackdump --]
[-- Type: application/octet-stream, Size: 1351 bytes --]

Exception: STATUS_ACCESS_VIOLATION at eip=6102B0BB
eax=00000000 ebx=00000000 ecx=00000000 edx=0000003C esi=0022E290 edi=616F196C
ebp=0022E238 esp=0022E238 program=C:\cygwin\bin\python2.3.exe, pid 892, thread main
cs=001B ds=0023 es=0023 fs=0038 gs=0000 ss=0023
Stack trace:
Frame     Function  Args
0022E238  6102B0BB  (00000000, 00000000, 0022E278, 6101E3BC)
0022E248  610416B4  (00000000, 610070B0, 00000001, 00000000)
0022E278  6101E3BC  (0022E290, 00000000, 00000000, 00000000)
0022E5E8  6101DF9F  (616F196C, 00000000, 00000000, 610EAEAF)
0022E618  6105BE95  (0022E650, 616F196C, 00000314, 0A200000)
0022E688  61043152  (616F1704, 0022E720, 0022E70C, 610A5C82)
0022E6C8  6105D7DC  (00000037, 0022E720, 0022E70C, 77F69471)
0022E838  610882AF  (0A1AF4E0, 00000000, 0022E878, 6B27556A)
0022E878  6B2AAD8A  (0022E8EC, 00000000, 0022E8F8, 6B261A04)
0022E908  6B2A89E3  (0A1960E4, 0A0E3460, 0A13C3E4, 00000000)
0022E958  6B2AAEF1  (0A0E9374, 0022EA0C, 00000001, 00000001)
0022E998  6B2AACAC  (0022EA0C, 00000000, 0000010D, 00000001)
0022EA28  6B2A89E3  (0A17F354, 0A232B20, 0A228BDC, 00000000)
0022EA78  6B2AAEF1  (0A235F44, 0022EB2C, 00000002, 00000002)
0022EAB8  6B2AACAC  (0022EB2C, 00000001, 00000001, 00000000)
0022EB48  6B2A89E3  (0A2C22CC, 0A232BE0, 0A228BDC, 00000000)
End of stack trace (more stack frames may be present)

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Re: python crash under cygwin 1.5.9 dll

[Jason Tishler]

Jordan,

On Tue, May 04, 2004 at 08:03:37AM -0700, Jordan Gannett wrote:
> Recently I tried upgrading to the cygwin-1.5.9-1 package, and after
> that, BitTorrent (a python-based program) started crashing
> consistently on certain inputs, with the error
> 
> segmentation fault (core dumped)
> 
> I tried downgrading back to 1.5.7, and then the problems disappeared.
> I tried 1.5.8 also, and that has the same crash as 1.5.9, so I'd guess
> it has something to do with changes starting in that release.

Does the latest snapshot work?

    http://cygwin.com/snapshots/

Jason

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