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Date: Sat, 12 Feb 2011 15:25:55 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Preremove/postinstall scripts fail with snapshot installed
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On Feb 11 16:22, Ken Brown wrote:
> If I run setup.exe with a cygwin snapshot installed, bash crashes
> while running all preremove and postinstall scripts.  Here's a
> typical error message in /var/log/setup.log.full:
> 
> 2011/02/11 15:56:55 running: C:\cygwin\bin\bash.exe --norc
> --noprofile /etc/preremove/emacs-X11.sh
>       0 [main] bash 2760 exception::handle: Exception:
> STATUS_ACCESS_VIOLATION
>    1739 [main] bash 2760 open_stackdumpfile: Dumping stack trace to
> bash.exe.stackdump

I'm sorry, but YA "works fine for me", on Windows 7 64 bit.

> Exception: STATUS_ACCESS_VIOLATION at eip=772DA671
> eax=000000F8 ebx=0089F4C0 ecx=0008EC50 edx=0028B974 esi=000000F8 edi=00000003
> ebp=0028B97C esp=0028B97C program=C:\cygwin\bin\bash.exe, pid 2712, thread main
> cs=0023 ds=002B es=002B fs=0053 gs=002B ss=002B
> Stack trace:
> Frame     Function  Args
> 0028B97C  772DA671  (000000F8, 0089D3A0, 00000000, 0028BA34)
> 0028B990  772E640D  (0089D3A0, 776E5386, 0028BAFC, 0028BA98)
> 0028BA34  7731E1DD  (0028BA60, 00000208, 0028BAFC, 00000000)
> 0028BA68  772DAD80  (0089F4C0, 00000208, 0028BAFC, 00000000)
> 0028BA84  772FC943  (0089F4C0, 00000208, 0028BAFC, 00000000)
> 0028BADC  7516C498  (00000001, 00000104, 0028BAFC, 0028BD44)
> 0028BD08  75170C30  (0028BD3C, 0028BDC8, 00000001, 0028C24C)
> 0028BD48  751709CB  (0089F298, 00000198, 00000000, 00000001)
> 0028BD6C  75170964  (0089F298, 00000198, 00000000, 00000080)
> 0028BFA0  75175C49  (0000019C, 00000198, 0089F298, 00000000)
> 0028BFF0  75175AFA  (0000019C, 0028C114, 00000000, 0000000A)
> 0028C680  75171ADC  (00000000, 60FE0018, 60FE0018, 6117974C)
> 0028C6B8  75161059  (60FE0018, 60FE0018, 6117974C, 6117974C)
> 0028C788  61066A75  (0028C7B4, 0028C790, 00DC5048, 610722B6)
> 0028C908  61067368  (000000FF, 0028C938, 0028C934, 004451D9)
> 0028C948  610C1185  (00DC50F8, 00000000, 00DC3BE0, 000000A0)
> End of stack trace (more stack frames may be present)

The last Cygwin address in this call stack (61066A75) is an entirely
harmless line in an entirely harmless function in a piece of code taken
from FreeBSD.  From there it goes downhill through at least two Windows
DLLs (all address starting with 7).  The joke is that this last Cygwin
address in the call stack is practically unable to generate an access
violation *and* it does not call any Windows function.  I habe no idea
why that happens, but it tastes a lot like a BLODA problem.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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