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Bug#684716: marked as done (gcc-4.7: problem with local variables, works in gcc-4.6)

Your message dated Tue, 14 Aug 2012 11:19:56 +0200
with message-id <502A183C.2050107@debian.org>
and subject line Re: Bug#684716: Bug#678525: GCC bug
has caused the Debian Bug report #684716,
regarding gcc-4.7: problem with local variables, works in gcc-4.6
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
684716: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=684716
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: gcc-4.7
Version: 4.7.1-6
Severity: normal

Dear Maintainer,
While trying to get calendar server to run, I also ran into the Debian bug #678525. I created a simplified test case and could show that it 
is a gcc bug, using the current gcc in sid (4.7.1-6).

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=678525

Included is gcc-bug.tar.gz that is a shortened version of the code
found in calendarserver :
http://trac.calendarserver.org/browser/CalendarServer/trunk/twext/python/sendmsg.c (Revision 8951) 

To run the example :
tar xvfz gcc-bug.tar.gz
cd gcc-bug
make fail
python sender.py

produces the faulty output :
SCM_RIGHTS constant :  1
First call
level 1
type  1
2a 00 00 00 (4)
Second call
level 1
type  0
2a 00 00 00 (4)

This is using the current gcc in Debian sid : gcc (Debian 4.7.1-6) 4.7.1

make ok
python sender.py

produces the correct output :
SCM_RIGHTS constant :  1
First call
level 1
type  1
2a 00 00 00 (4)
Second call
level 1
type  1
2a 00 00 00 (4)

This using current gcc-4.6 in Debian sid : gcc-4.6 (Debian 4.6.3-8) 4.6.3

The first and the second call should produce the same output but
in the faulty run type becomes 0.
Due to the 0, the linux kernel check in
http://lxr.linux.no/linux+v3.2/net/core/scm.c#L159
fails, and gives the Invalid Argument error in the Debian bug #678525.

If more information is needed let me know.

Thank you,

Fredrik Unger

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gcc-4.7 depends on:
ii  binutils      2.22-7.1
ii  cpp-4.7       4.7.1-6
ii  gcc-4.7-base  4.7.1-6
ii  libc6         2.13-35
ii  libgcc1       1:4.7.1-6
ii  libgmp10      2:5.0.5+dfsg-2
ii  libgomp1      4.7.1-6
ii  libitm1       4.7.1-6
ii  libmpc2       0.9-4
ii  libmpfr4      3.1.0-5
ii  libquadmath0  4.7.1-6
ii  zlib1g        1:1.2.7.dfsg-13

Versions of packages gcc-4.7 recommends:
ii  libc6-dev  2.13-35

Versions of packages gcc-4.7 suggests:
pn  binutils-gold        <none>
pn  gcc-4.7-doc          <none>
pn  gcc-4.7-locales      <none>
pn  gcc-4.7-multilib     <none>
pn  libgcc1-dbg          <none>
pn  libgomp1-dbg         <none>
pn  libitm1-dbg          <none>
pn  libmudflap0-4.7-dev  <none>
pn  libmudflap0-dbg      <none>
pn  libquadmath0-dbg     <none>

-- no debconf information

Attachment: gcc-bug.tar.gz
Description: application/gzip


--- End Message ---
--- Begin Message --- 
On 14.08.2012 00:49, James Y Knight wrote:
> It's not a bug in GCC. It's a bug in the code. The second call to
> PyArg_ParseTuple passes an int* where a Py_ssize_t* should be passed. (The
> &data_len argument).

thanks!. Closing the gcc task.

--- End Message ---
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