.
Thread 1 (process 5692):
#0  0x00007ff16b77f066 in pkgCache::FindPkg ()
   from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
#1  0x00007ff16b7ab068 in pkgCacheGenerator::NewPackage ()
   from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
#2  0x00007ff16b7abdcc in pkgCacheGenerator::MergeList ()
   from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
#3  0x00007ff16b7df6a5 in debStatusIndex::Merge ()
   from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
#4  0x00007ff16b7ab9c8 in ?? () from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
#5  0x00007ff16b7aea31 in pkgMakeStatusCache ()
   from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
#6  0x0000000000409a03 in ?? ()
#7  0x00007ff16ac485a6 in __libc_start_main () from /lib/libc.so.6
#8  0x0000000000403649 in ?? ()
#9  0x00007fff73c24b08 in ?? ()
#10 0x000000000000001c in ?? ()
#11 0x0000000000000003 in ?? ()
#12 0x00007fff73c25b8a in ?? ()
#13 0x00007fff73c25b94 in ?? ()
#14 0x00007fff73c25b9b in ?? ()
#15 0x0000000000000000 in ?? ()