.
Thread 2 (Thread 3426):
#0  0x00356422 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00dfbf55 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#2  0x081b212a in ?? ()
No symbol table info available.
#3  0x081d22ec in ?? ()
No symbol table info available.
#4  0x00df78de in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#5  0x005f495e in clone () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
.
Thread 1 (Thread 3425):
#0  0x0818745f in ?? ()
No symbol table info available.
#1  0x00167c34 in pkgAcquire::Worker::RunMessages() ()
   from /usr/lib/libapt-pkg-libc6.10-6.so.4.8
No symbol table info available.
#2  0x00168942 in pkgAcquire::Worker::InFdReady() ()
   from /usr/lib/libapt-pkg-libc6.10-6.so.4.8
No symbol table info available.
#3  0x00160cb2 in pkgAcquire::RunFds(fd_set*, fd_set*) ()
   from /usr/lib/libapt-pkg-libc6.10-6.so.4.8
No symbol table info available.
#4  0x001629de in pkgAcquire::Run(int) ()
   from /usr/lib/libapt-pkg-libc6.10-6.so.4.8
No symbol table info available.
#5  0x081dec0c in ?? ()
No symbol table info available.
#6  0x08149290 in ?? ()
No symbol table info available.
#7  0x08144ea1 in ?? ()
No symbol table info available.
#8  0x0805efce in ?? ()
No symbol table info available.
#9  0x0053dbd6 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#10 0x0805c6a1 in ?? ()
No symbol table info available.