Bug#37530: apt-get dumps core

[Guy Maor <maor@debian.org>]

Package: apt
Version: 0.3.4

You're passing a null pointer to string ctor.

(gdb) run install xscreensaver
Starting program: /var/tmp/apt-0.3.4/build/bin/apt-get install xscreensaver
Linux thread target has modified Unknown signal handling
Reading Package Lists... Done
Building Dependency Tree... Done
The following NEW packages will be installed:
  xscreensaver 
0 packages upgraded, 1 newly installed, 0 to remove and 45 not upgraded.
1 packages not fully installed or removed.

Program received signal SIGSEGV, Segmentation fault.
0x400c11a7 in basic_string<char, string_char_traits<char>, __default_alloc_templ
ate<true, 0> >::basic_string ()
(gdb) where
#0  0x400c11a7 in basic_string<char, string_char_traits<char>, __default_alloc_t
emplate<true, 0> >::basic_string ()
#1  0x40068263 in pkgAcqArchive::pkgAcqArchive (this=0x8099a50, 
    Owner=0xbffff810, Sources=0xbffff838, Recs=0xbffff808, 
    Version=@0xbffff5e4, StoreFilename=@0x80938d4) at acquire-item.cc:368
#2  0x4005d3b9 in pkgPackageManager::GetArchives (this=0xbffff844, 
    Owner=0xbffff810, Sources=0xbffff838, Recs=0xbffff808)
    at packagemanager.cc:74
#3  0x80502f3 in InstallPackages (Cache=@0xbffffa8c, ShwKept=false, Ask=false, 
    Saftey=true) at apt-get.cc:541
#4  0x8052b8f in DoInstall (CmdL=@0xbffffae4) at apt-get.cc:936
#5  0x40046ac1 in CommandLine::DispatchArg (this=0xbffffae4, Map=0xbffffaf0, 
    NoMatch=true) at contrib/cmndline.cc:331
#6  0x8053ead in main (argc=3, argv=0xbffffcf4) at apt-get.cc:1231
(gdb) up  
#1  0x40068263 in pkgAcqArchive::pkgAcqArchive (this=0x8099a50, 
    Owner=0xbffff810, Sources=0xbffff838, Recs=0xbffff808, 
    Version=@0xbffff5e4, StoreFilename=@0x80938d4) at acquire-item.cc:368
368                        QuoteString(Version.Arch(),"_:.") + ".deb";
(gdb) l
363        Retries = _config->FindI("Acquire::Retries",0);
364           
365        // Generate the final file name as: package_version_arch.deb
366        StoreFilename = QuoteString(Version.ParentPkg().Name(),"_:") + '_' +
367                        QuoteString(Version.VerStr(),"_:") + '_' +
368                        QuoteString(Version.Arch(),"_:.") + ".deb";
369        
370        // Select a source
371        if (QueueNext() == false && _error->PendingError() == false)
372           _error->Error("I wasn't able to locate file for the %s package. "
(gdb) p Version.Arch()
$1 = 0x0

The core dump is at master:~maor/apt.core if you need to learn more.
It's built with CFLAGS=-g CXXFLAGS=-g.


Guy