As a bonus, here's a partial stacktrace, with apt rebuilt with nostrip: #0 0x00007f75d1e05b10 in vtable for pkgDepCache () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12 #1 0x00007f75d205fda9 in pkgCache::Iterator<pkgCache::Package, pkgCache::PkgIterator>::end (this=0x7fff16a97660) at ../build/include/apt-pkg/cacheiterators.h:64 #2 0x00007f75d1b33749 in pkgDepCache::IsModeChangeOk (this=0x7f75d39c04a0, mode=pkgDepCache::ModeKeep, Pkg=..., Depth=0, FromUser=false) at /root/apt-1.0.9.10/apt-pkg/depcache.cc:918 #3 0x00007f75d1b32e6e in pkgDepCache::MarkKeep (this=0x7f75d39c04a0, Pkg=..., Soft=false, FromUser=false, Depth=0) at /root/apt-1.0.9.10/apt-pkg/depcache.cc:769 #4 0x00007f75d1b2d5e4 in pkgProblemResolver::ResolveInternal (this=0x7f75d3a6d5a0, BrokenFix=true) at /root/apt-1.0.9.10/apt-pkg/algorithms.cc:1061 #5 0x00007f75cefbf258 in ?? () #6 0x00007f75d39c0ce0 in ?? () #7 0x0000000000000000 in ?? ()
valgrind helpfully reports: ==1801== Use of uninitialised value of size 8 ==1801== at 0x131D9D: pkgCache::Iterator<pkgCache::Package, pkgCache::PkgIterator>::end() const (in /usr/bin/apt-get) ==1801== by 0x4F90748: pkgDepCache::IsModeChangeOk(pkgDepCache::ModeList, pkgCache::PkgIterator const&, unsigned long, bool) (depcache.cc:918) ==1801== by 0x4F8FE6D: pkgDepCache::MarkKeep(pkgCache::PkgIterator const&, bool, bool, unsigned long) (depcache.cc:769) ==1801== by 0x4F8A5E3: pkgProblemResolver::ResolveInternal(bool) (algorithms.cc:1061) ==1801== by 0x7BF2257: ??? (in /var/cache/apt/pkgcache.bin) ==1801== ==1801== ==1801== Process terminating with default action of signal 11 (SIGSEGV): dumping core ==1801== Bad permissions for mapped region at address 0x5262B10 ==1801== at 0x5262B10: vtable for pkgDepCache (in /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12.0) ==1801== by 0x4F90748: pkgDepCache::IsModeChangeOk(pkgDepCache::ModeList, pkgCache::PkgIterator const&, unsigned long, bool) (depcache.cc:918) ==1801== by 0x4F8FE6D: pkgDepCache::MarkKeep(pkgCache::PkgIterator const&, bool, bool, unsigned long) (depcache.cc:769) ==1801== by 0x4F8A5E3: pkgProblemResolver::ResolveInternal(bool) (algorithms.cc:1061) ==1801== by 0x7BF2257: ??? (in /var/cache/apt/pkgcache.bin) - Rich -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org