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Thread 1 (LWP 1759):
#0  0x00007f51b601af95 in pkgDepCache::CheckDep(pkgCache::DepIterator, int, pkgCache::PkgIterator&) () from /usr/lib/libapt-pkg.so.4.11
No symbol table info available.
#1  0x00007f51b601ba83 in pkgDepCache::DependencyState(pkgCache::DepIterator&) () from /usr/lib/libapt-pkg.so.4.11
No symbol table info available.
#2  0x00007f51b601bf10 in pkgDepCache::Update(OpProgress*) () from /usr/lib/libapt-pkg.so.4.11
No symbol table info available.
#3  0x00007f51b602123e in pkgDepCache::Init(OpProgress*) () from /usr/lib/libapt-pkg.so.4.11
No symbol table info available.
#4  0x00007f51b604b1fd in pkgCacheFile::BuildDepCache(OpProgress*) () from /usr/lib/libapt-pkg.so.4.11
No symbol table info available.
#5  0x00007f51b604b27a in pkgCacheFile::Open(OpProgress*, bool) () from /usr/lib/libapt-pkg.so.4.11
No symbol table info available.
#6  0x0000000000413f5e in ?? ()
No symbol table info available.
#7  0x00007f51b6009133 in CommandLine::DispatchArg(CommandLine::Dispatch*, bool) () from /usr/lib/libapt-pkg.so.4.11
No symbol table info available.
#8  0x00000000004090d4 in ?? ()
No symbol table info available.
#9  0x00007f51b573130d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#10 0x00000000004093f1 in ?? ()
No symbol table info available.
#11 0x00007fff7f47af48 in ?? ()
No symbol table info available.
#12 0x000000000000001c in ?? ()
No symbol table info available.
#13 0x0000000000000002 in ?? ()
No symbol table info available.
#14 0x00007fff7f47c925 in ?? ()
No symbol table info available.
#15 0x00007fff7f47c92d in ?? ()
No symbol table info available.
#16 0x0000000000000000 in ?? ()
No symbol table info available.