.
Thread 1 (LWP 2190):
#0  FileList (this=<optimized out>) at ../build/include/apt-pkg/cacheiterators.h:435
No locals.
#1  pkgPolicy::GetCandidateVer (this=0x210e310, Pkg=...) at policy.cc:173
        VF = {<pkgCache::Iterator<pkgCache::VerFile, pkgCache::VerFileIterator>> = {<std::iterator<std::forward_iterator_tag, pkgCache::VerFile, long, pkgCache::VerFile*, pkgCache::VerFile&>> = {<No data fields>}, _vptr.Iterator = 0x2111080, S = 0x7f62ab7c9000, Owner = 0x4282f0}, <No data fields>}
        instVer = <optimized out>
        Ver = {<pkgCache::Iterator<pkgCache::Version, pkgCache::VerIterator>> = {<std::iterator<std::forward_iterator_tag, pkgCache::Version, long, pkgCache::Version*, pkgCache::Version&>> = {<No data fields>}, _vptr.Iterator = 0x4282f0, S = 0x7f62abdbd840, Owner = 0x2111080}, <No data fields>}
        Max = <optimized out>
        Pref = {<pkgCache::Iterator<pkgCache::Version, pkgCache::VerIterator>> = {<std::iterator<std::forward_iterator_tag, pkgCache::Version, long, pkgCache::Version*, pkgCache::Version&>> = {<No data fields>}, _vptr.Iterator = 0x4282f0, S = 0x7f62ab7c9000, Owner = 0x2111080}, <No data fields>}
        MaxAlt = <optimized out>
        PrefAlt = <optimized out>
#2  0x00007f62aeb3d13b in GetCandidateVer (Pkg=..., this=<optimized out>) at ../build/include/apt-pkg/depcache.h:355
No locals.
#3  pkgDepCache::Init (this=0x2112730, Prog=0x7fffa7b03c50) at depcache.cc:149
        State = @0x7f62ab2ccc30
        I = {<pkgCache::Iterator<pkgCache::Package, pkgCache::PkgIterator>> = {<std::iterator<std::forward_iterator_tag, pkgCache::Package, long, pkgCache::Package*, pkgCache::Package&>> = {<No data fields>}, _vptr.Iterator = 0x62e110, S = 0x7f62abdc8108, Owner = 0x2111080}, HashIndex = 14}
        actions = {cache = @0x2112730, released = false}
        Done = <optimized out>
#4  0x00007f62aeb6bcad in pkgCacheFile::BuildDepCache (this=0x7fffa7b03cd0, Progress=0x7fffa7b03c50) at cachefile.cc:143
No locals.
#5  0x00007f62aeb6bd2a in pkgCacheFile::Open (this=0x7fffa7b03cd0, Progress=0x7fffa7b03c50, WithLock=<optimized out>) at cachefile.cc:158
No locals.
#6  0x000000000040f0b4 in Open (WithLock=true, this=0x7fffa7b03cd0) at apt-get.cc:108
        Prog = {<OpProgress> = {_vptr.OpProgress = 0x62dad0, Current = 0, Total = 170894, Size = 85447, SubTotal = 85447, LastPercent = 0, LastTime = {tv_sec = 0, tv_usec = 0}, LastOp = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x210f1b8 "Building dependency tree"}}, LastSubOp = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x210f178 "Candidate versions"}}, Op = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x210f1b8 "Building dependency tree"}}, SubOp = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x210f178 "Candidate versions"}}, Percent = 0.315985352, MajorChange = false}, OldOp = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x62e018 ""}}, NoUpdate = true, NoDisplay = true, LastLen = 0}
#7  DoCheck (CmdL=<optimized out>) at apt-get.cc:2373
        Cache = {<pkgCacheFile> = {_vptr.pkgCacheFile = 0x428610, d = 0xffffffffffffff80, Map = 0x2111050, Cache = 0x2111080, DCache = 0x2112730, SrcList = 0x210ced0, Policy = 0x210e310}, static SortCache = 0x0, List = 0x0}
#8  0x00007f62aeb241e3 in CommandLine::DispatchArg (this=0x7fffa7b044b0, Map=<optimized out>, NoMatch=true) at contrib/cmndline.cc:337
        Res = <optimized out>
        I = <optimized out>
#9  0x0000000000409ad4 in main (argc=4, argv=<optimized out>) at apt-get.cc:3502
        Args = {{ShortOpt = 104 'h', LongOpt = 0x427282 "help", ConfName = 0x427282 "help", Flags = 0}, {ShortOpt = 118 'v', LongOpt = 0x426f1b "version", ConfName = 0x426f1b "version", Flags = 0}, {ShortOpt = 86 'V', LongOpt = 0x427287 "verbose-versions", ConfName = 0x427093 "APT::Get::Show-Versions", Flags = 0}, {ShortOpt = 113 'q', LongOpt = 0x427020 "quiet", ConfName = 0x427020 "quiet", Flags = 2}, {ShortOpt = 113 'q', LongOpt = 0x427298 "silent", ConfName = 0x427020 "quiet", Flags = 2}, {ShortOpt = 100 'd', LongOpt = 0x42729f "download-only", ConfName = 0x4272ad "APT::Get::Download-Only", Flags = 0}, {ShortOpt = 98 'b', LongOpt = 0x4272c5 "compile", ConfName = 0x4272cd "APT::Get::Compile", Flags = 0}, {ShortOpt = 98 'b', LongOpt = 0x4272df "build", ConfName = 0x4272cd "APT::Get::Compile", Flags = 0}, {ShortOpt = 115 's', LongOpt = 0x4272e5 "simulate", ConfName = 0x426f6c "APT::Get::Simulate", Flags = 0}, {ShortOpt = 115 's', LongOpt = 0x4272ee "just-print", ConfName = 0x426f6c "APT::Get::Simulate", Flags = 0}, {ShortOpt = 115 's', LongOpt = 0x4272f9 "recon", ConfName = 0x426f6c "APT::Get::Simulate", Flags = 0}, {ShortOpt = 115 's', LongOpt = 0x4272ff "dry-run", ConfName = 0x426f6c "APT::Get::Simulate", Flags = 0}, {ShortOpt = 115 's', LongOpt = 0x427307 "no-act", ConfName = 0x426f6c "APT::Get::Simulate", Flags = 0}, {ShortOpt = 121 'y', LongOpt = 0x427435 "yes", ConfName = 0x427068 "APT::Get::Assume-Yes", Flags = 0}, {ShortOpt = 121 'y', LongOpt = 0x42730e "assume-yes", ConfName = 0x427068 "APT::Get::Assume-Yes", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427319 "assume-no", ConfName = 0x426f7f "APT::Get::Assume-No", Flags = 0}, {ShortOpt = 102 'f', LongOpt = 0x427323 "fix-broken", ConfName = 0x4271cc "APT::Get::Fix-Broken", Flags = 0}, {ShortOpt = 117 'u', LongOpt = 0x42732e "show-upgraded", ConfName = 0x42733c "APT::Get::Show-Upgraded", Flags = 0}, {ShortOpt = 109 'm', LongOpt = 0x427354 "ignore-missing", ConfName = 0x427363 "APT::Get::Fix-Missing", Flags = 0}, {ShortOpt = 116 't', LongOpt = 0x427379 "target-release", ConfName = 0x427227 "APT::Default-Release", Flags = 1}, {ShortOpt = 116 't', LongOpt = 0x427388 "default-release", ConfName = 0x427227 "APT::Default-Release", Flags = 1}, {ShortOpt = 97 'a', LongOpt = 0x427398 "host-architecture", ConfName = 0x4273aa "APT::Get::Host-Architecture", Flags = 1}, {ShortOpt = 0 '\000', LongOpt = 0x4277c9 "download", ConfName = 0x427055 "APT::Get::Download", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x4273c6 "fix-missing", ConfName = 0x427363 "APT::Get::Fix-Missing", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x4273d2 "ignore-hold", ConfName = 0x4273de "APT::Ignore-Hold", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x42763c "upgrade", ConfName = 0x4273ef "APT::Get::upgrade", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427401 "only-upgrade", ConfName = 0x42740e "APT::Get::Only-Upgrade", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x42742f "force-yes", ConfName = 0x427425 "APT::Get::force-yes", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427439 "print-uris", ConfName = 0x427026 "APT::Get::Print-URIs", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427444 "diff-only", ConfName = 0x42744e "APT::Get::Diff-Only", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427462 "debian-only", ConfName = 0x42744e "APT::Get::Diff-Only", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x42746e "tar-only", ConfName = 0x427477 "APT::Get::Tar-Only", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x42748a "dsc-only", ConfName = 0x427493 "APT::Get::Dsc-Only", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x4274a6 "purge", ConfName = 0x4274ac "APT::Get::Purge", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x4274bc "list-cleanup", ConfName = 0x4274c9 "APT::Get::List-Cleanup", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x4274e0 "reinstall", ConfName = 0x4274ea "APT::Get::ReInstall", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x4274fe "trivial-only", ConfName = 0x42750b "APT::Get::Trivial-Only", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427562 "remove", ConfName = 0x427522 "APT::Get::Remove", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427533 "only-source", ConfName = 0x427254 "APT::Get::Only-Source", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x42753f "arch-only", ConfName = 0x427549 "APT::Get::Arch-Only", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x42755d "auto-remove", ConfName = 0x427569 "APT::Get::AutomaticRemove", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427583 "allow-unauthenticated", ConfName = 0x425b90 "APT::Get::AllowUnauthenticated", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427599 "install-recommends", ConfName = 0x4275ac "APT::Install-Recommends", Flags = 4}, {ShortOpt = 0 '\000', LongOpt = 0x4275c4 "install-suggests", ConfName = 0x4275d5 "APT::Install-Suggests", Flags = 4}, {ShortOpt = 0 '\000', LongOpt = 0x4275eb "fix-policy", ConfName = 0x4271e1 "APT::Get::Fix-Policy-Broken", Flags = 0}, {ShortOpt = 0 '\000', LongOpt = 0x427b03 "solver", ConfName = 0x4275f6 "APT::Solver", Flags = 1}, {ShortOpt = 99 'c', LongOpt = 0x427602 "config-file", ConfName = 0x0, Flags = 17}, {ShortOpt = 111 'o', LongOpt = 0x42760e "option", ConfName = 0x0, Flags = 33}, {ShortOpt = 0 '\000', LongOpt = 0x0, ConfName = 0x0, Flags = 0}}
        Cmds = {{Match = 0x427615 "update", Handler = 0x40ad00 <DoUpdate(CommandLine&)>}, {Match = 0x42763c "upgrade", Handler = 0x414b60 <DoUpgrade(CommandLine&)>}, {Match = 0x4274e2 "install", Handler = 0x41bee0 <DoInstall(CommandLine&)>}, {Match = 0x427562 "remove", Handler = 0x41bee0 <DoInstall(CommandLine&)>}, {Match = 0x4274a6 "purge", Handler = 0x41bee0 <DoInstall(CommandLine&)>}, {Match = 0x42761c "autoremove", Handler = 0x41bee0 <DoInstall(CommandLine&)>}, {Match = 0x4271aa "markauto", Handler = 0x40e8a0 <DoMarkAuto(CommandLine&)>}, {Match = 0x4271a8 "unmarkauto", Handler = 0x40e8a0 <DoMarkAuto(CommandLine&)>}, {Match = 0x427627 "dist-upgrade", Handler = 0x414750 <DoDistUpgrade(CommandLine&)>}, {Match = 0x427634 "dselect-upgrade", Handler = 0x414030 <DoDSelectUpgrade(CommandLine&)>}, {Match = 0x427644 "build-dep", Handler = 0x417f70 <DoBuildDep(CommandLine&)>}, {Match = 0x427652 "clean", Handler = 0x40a860 <DoClean(CommandLine&)>}, {Match = 0x42764e "autoclean", Handler = 0x40e450 <DoAutoClean(CommandLine&)>}, {Match = 0x427658 "check", Handler = 0x40f060 <DoCheck(CommandLine&)>}, {Match = 0x427920 "source", Handler = 0x414dc0 <DoSource(CommandLine&)>}, {Match = 0x4277c9 "download", Handler = 0x411480 <DoDownload(CommandLine&)>}, {Match = 0x427665 "changelog", Handler = 0x410d40 <DoChangelog(CommandLine&)>}, {Match = 0x42765e "moo", Handler = 0x409f60 <DoMoo(CommandLine&)>}, {Match = 0x427282 "help", Handler = 0x409f90 <ShowHelp(CommandLine&)>}, {Match = 0x0, Handler = 0}}
        CmdL = {ArgList = 0x7fffa7b03d50, Conf = 0x2106010, FileList = 0x210d490}