[Bug 1516438] Re: Segfault when simulating removing all i386 packages

[Axel Beckert]

Hi,

Nate Eldredge wrote:
> I wanted to see what would happen if I removed all i386 packages (I am
> on amd64) so I ran
> 
> aptitude -s remove '~ri386 ~i'

At least can't reproduce this with 0.7.4-1 in Debian. 0.7.3 is known
to be quite buggy.

> I got a segfault.  I compiled aptitude with debug info

No need to do this, there is a debug package for aptitude:
http://packages.ubuntu.com/search?keywords=aptitude-dbg

> There then follow hundreds more repetitions of internal_mark_delete.  I
> am not sure if this is very deep recursion, or stack corruption, or
> what.

Yeah. This is very likely https://bugs.debian.org/801430 (circular
dependencies in internal_mark_delete()) which has been fixed in 0.7.4-1.

> I assume this is probably specific to the set of packages I have
> installed.  What is the best way for me to send the information that you
> need?

aptitude-create-state-bundle -- but that's probably not needed as this
is very likely already fixed (in Debian).

		Regards, Axel
-- 
 ,''`.  |  Axel Beckert <abe at debian.org>, http://people.debian.org/~abe/
: :' :  |  Debian Developer, ftp.ch.debian.org Admin
`. `'   |  4096R: 2517 B724 C5F6 CA99 5329  6E61 2FF9 CD59 6126 16B5
  `-    |  1024D: F067 EA27 26B9 C3FC 1486  202E C09E 1D89 9593 0EDE


** Bug watch added: Debian Bug tracker #801430
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=801430

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https://bugs.launchpad.net/bugs/1516438

Title:
  Segfault when simulating removing all i386 packages

Status in aptitude package in Ubuntu:
  New

Bug description:
  I wanted to see what would happen if I removed all i386 packages (I am
  on amd64) so I ran

  aptitude -s remove '~ri386 ~i'

  I got a segfault.  I compiled aptitude with debug info and got this
  backtrace:

  #0  0x00007ffff5a518ef in _int_malloc (av=av at entry=0x7ffff5d94c00 <main_arena>, bytes=bytes at entry=48)
      at malloc.c:3326
  #1  0x00007ffff5a5450e in __GI___libc_malloc (bytes=48) at malloc.c:2895
  #2  0x00007ffff6347188 in operator new(unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
  #3  0x00007ffff7b42177 in pkgDepCache::SetReInstall(pkgCache::PkgIterator const&, bool) ()
     from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.16
  #4  0x0000555555795974 in aptitudeDepCache::internal_mark_delete (this=0x555555daff30, Pkg=..., Purge=false, 
      unused_delete=true) at ../../../../src/generic/apt/aptcache.cc:1248

  There then follow hundreds more repetitions of internal_mark_delete.
  I am not sure if this is very deep recursion, or stack corruption, or
  what.

  I assume this is probably specific to the set of packages I have
  installed.  What is the best way for me to send the information that
  you need?

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: aptitude 0.7.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
  Uname: Linux 4.2.0-18-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.19.1-0ubuntu4
  Architecture: amd64
  Date: Sun Nov 15 13:02:14 2015
  SourcePackage: aptitude
  UpgradeStatus: Upgraded to wily on 2015-11-15 (0 days ago)

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