 sudo gdb shotwell 1337
[sudo] Passwort für philipp: 
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1
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Reading symbols from shotwell...(no debugging symbols found)...done.
Attaching to program: /usr/bin/shotwell, process 1337
[New LWP 1340]
[New LWP 1341]
[New LWP 1342]
[New LWP 1343]
[New LWP 1344]
[New LWP 1345]
[New LWP 1346]
[New LWP 1347]
[New LWP 1589]
[New LWP 1625]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f4bfa048248 in gdk_pixbuf_rotate_simple ()
   from /usr/lib/x86_64-linux-gnu/libgdk_pixbuf-2.0.so.0
(gdb) t a a bt

Thread 11 (Thread 0x7f4bd1579700 (LWP 1625)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f4bf9539d4a in g_cond_wait_until ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf94c9999 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf951c536 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4bf951bbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4bd1579700)
    at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f4bca289700 (LWP 1589)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f4bf9539d4a in g_cond_wait_until ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf94c9999 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf951c536 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4bf951bbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4bca289700)
    at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone ()
---Type <return> to continue, or q <return> to quit---
   109

Thread 9 (Thread 0x7f4bd26eb700 (LWP 1347)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f4bf9539c2f in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf94c99db in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf951c5b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4bf951bbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4bd26eb700) at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f4bd2eec700 (LWP 1346)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f4bf9539c2f in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf94c99db in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf951c5b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4bf951bbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4bd2eec700) at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f4bd36ed700 (LWP 1345)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f4bf9539c2f in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf94c99db in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf951c5b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4bf951bbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4bd36ed700) at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f4bd3eee700 (LWP 1344)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f4bf9539c2f in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf94c99db in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf951c5b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4bf951bbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4bd3eee700) at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f4bd5226700 (LWP 1343)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4bf5fbc91c in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2  0x00007f4bdd50731e in bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>::threadRunLoop() ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#3  0x00007f4bdd507439 in bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>::threadEntryPoint(bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::*)()>*) () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#4  0x00007f4bf5fc1c80 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4bd5226700) at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f4be6c2e700 (LWP 1342)):
#0  0x00007f4bf8fbfe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4bf94f539c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf94f54ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bec3bc28d in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#4  0x00007f4bf951bbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4be6c2e700) at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4be7fff700 (LWP 1341)):
#0  0x00007f4bf8fbfe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4bf94f539c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf94f5722 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf9af3916 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f4bf951bbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4be7fff700) at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4becff4700 (LWP 1340)):
#0  0x00007f4bf8fbfe8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4bf94f539c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4bf94f54ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4bf94f54e9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4bf951bbc5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4bf92956fa in start_thread (arg=0x7f4becff4700) at pthread_create.c:333
#6  0x00007f4bf8fcbb5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4bfd4ccac0 (LWP 1337)):
#0  0x00007f4bfa048248 in gdk_pixbuf_rotate_simple () from /usr/lib/x86_64-linux-gnu/libgdk_pixbuf-2.0.so.0
#1  0x000055f0eac5a9d9 in photo_get_pixbuf_with_options ()
#2  0x000055f0eac5d18a in ?? ()
#3  0x000055f0eac08a66 in ?? ()
#4  0x000055f0eac08c60 in thumbnail_cache_import_from_source ()
#5  0x000055f0eac64183 in ?? ()
#6  0x000055f0eaaead7a in ?? ()
---Type <return> to continue, or q <return> to quit---
#7  0x00007f4bf94f505a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f4bf94f5400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f4bf94f54ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f4bf9abccdd in g_application_run () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#11 0x000055f0ead03289 in application_start ()
#12 0x000055f0eabf653e in library_exec ()
#13 0x000055f0eabf71db in _vala_main ()
#14 0x000055f0eaae6450 in main ()
(gdb)
