.
Thread 1 (Thread 0x7ffb51d9b700 (LWP 6317)):
#0  0x00007ffb507ed48b in ?? () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007ffb4bd6e826 in std::string::compare(char const*) const () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#2  0x00007ffb4c0baca9 in debPackagesIndex::FindInCache(pkgCache&) const () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
No symbol table info available.
#3  0x00007ffb4c05f18f in ?? () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
No symbol table info available.
#4  0x00007ffb4c061504 in pkgCacheGenerator::MakeStatusCache(pkgSourceList&, OpProgress*, MMap**, bool) () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
No symbol table info available.
#5  0x00007ffb4c05826a in pkgCacheFile::BuildCaches(OpProgress*, bool) () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
No symbol table info available.
#6  0x00007ffb4c058694 in pkgCacheFile::Open(OpProgress*, bool) () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
No symbol table info available.
#7  0x00007ffb4c31751a in ?? () from /usr/lib/python2.7/dist-packages/apt_pkg.so
No symbol table info available.
#8  0x00000000004df9b8 in ?? ()
No symbol table info available.
#9  0x000000000050bbf6 in PyObject_Call ()
No symbol table info available.
#10 0x00000000005673ba in PyEval_EvalFrameEx ()
No symbol table info available.
#11 0x000000000056e172 in PyEval_EvalCodeEx ()
No symbol table info available.
#12 0x0000000000567308 in PyEval_EvalFrameEx ()
No symbol table info available.
#13 0x000000000056e172 in PyEval_EvalCodeEx ()
No symbol table info available.
#14 0x000000000054d500 in ?? ()
No symbol table info available.
#15 0x000000000050bbf6 in PyObject_Call ()
No symbol table info available.
#16 0x00000000004e82fa in ?? ()
No symbol table info available.
#17 0x000000000050bbf6 in PyObject_Call ()
No symbol table info available.
#18 0x0000000000438c9e in ?? ()
No symbol table info available.
#19 0x00000000004dfa76 in ?? ()
No symbol table info available.
#20 0x000000000050bbf6 in PyObject_Call ()
No symbol table info available.
#21 0x00000000005673ba in PyEval_EvalFrameEx ()
No symbol table info available.
#22 0x000000000056e172 in PyEval_EvalCodeEx ()
No symbol table info available.
#23 0x0000000000567308 in PyEval_EvalFrameEx ()
No symbol table info available.
#24 0x000000000056e172 in PyEval_EvalCodeEx ()
No symbol table info available.
#25 0x000000000054d500 in ?? ()
No symbol table info available.
#26 0x000000000050bbf6 in PyObject_Call ()
No symbol table info available.
#27 0x00000000004e82fa in ?? ()
No symbol table info available.
#28 0x000000000050bbf6 in PyObject_Call ()
No symbol table info available.
#29 0x000000000050c206 in PyEval_CallObjectWithKeywords ()
No symbol table info available.
#30 0x00007ffb4e8ea67b in _pyglib_handler_marshal () from /usr/lib/libpyglib-gi-2.0-python2.7.so.0
No symbol table info available.
#31 0x00007ffb4eb34c9a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#32 0x00007ffb4eb35060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#33 0x00007ffb4eb3545a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#34 0x00007ffb4d703e91 in ?? () from /usr/lib/python2.7/dist-packages/gi/_glib/_glib.so
No symbol table info available.
#35 0x0000000000567891 in PyEval_EvalFrameEx ()
No symbol table info available.
#36 0x0000000000567552 in PyEval_EvalFrameEx ()
No symbol table info available.
#37 0x0000000000567552 in PyEval_EvalFrameEx ()
No symbol table info available.
#38 0x000000000056e172 in PyEval_EvalCodeEx ()
No symbol table info available.
#39 0x000000000054df1d in PyRun_SimpleFileExFlags ()
No symbol table info available.
#40 0x0000000000553693 in Py_Main ()
No symbol table info available.
#41 0x00007ffb506ad76d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#42 0x000000000041ba31 in _start ()
No symbol table info available.