#0  0x00007fd7897ca227 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
  [Error: raise.c was not found in source tree]
#1  0x00007fd7897cbe8a in __GI_abort () at abort.c:89
  [Error: abort.c was not found in source tree]
#2  0x00007fd78980dbb3 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7fd789926128 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
  [Error: libc_fatal.c was not found in source tree]
#3  0x00007fd789815bc9 in malloc_printerr (ptr=<optimized out>, str=0x7fd7899261a0 "free(): invalid next size (fast)", action=1) at malloc.c:4965
  [Error: malloc.c was not found in source tree]
#4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3834
  [Error: malloc.c was not found in source tree]
#5  0x00007fd7898197fc in __GI___libc_free (mem=<optimized out>) at malloc.c:2950
  [Error: malloc.c was not found in source tree]
#6  0x00007fd78801d3be in _pygi_closure_handle () from /tmp/apport_sandbox_zFmgT3/usr/lib/python3/dist-packages/gi/_gi.cpython-35m-x86_64-linux-gnu.so
#7  0x00007fd78765ac2f in ffi_closure_unix64_inner () from /tmp/apport_sandbox_zFmgT3/usr/lib/x86_64-linux-gnu/libffi.so.6
#8  0x00007fd78765afa8 in ffi_closure_unix64 () from /tmp/apport_sandbox_zFmgT3/usr/lib/x86_64-linux-gnu/libffi.so.6
#9  0x00007fd786459c69 in unity_scope_loader_load_and_export (self=self@entry=0x1c21d30, module=0x1ca7160 "calculator.unity_calculator_daemon", module_type=0x1ca7ae0 "python3", error=error@entry=0x7fff360b5ce0) at unity-scope-loader.c:329
  [Error: unity-scope-loader.c was not found in source tree]
#10 0x00007fd786459fd4 in unity_scope_loader_load_scope (self=0x1c21d30, scope_id=<optimized out>, error=0x7fff360b5f10) at unity-scope-loader.c:452
  [Error: unity-scope-loader.c was not found in source tree]
#11 0x00007fd78765ae40 in ffi_call_unix64 () from /tmp/apport_sandbox_zFmgT3/usr/lib/x86_64-linux-gnu/libffi.so.6
#12 0x00007fd78765a8ab in ffi_call () from /tmp/apport_sandbox_zFmgT3/usr/lib/x86_64-linux-gnu/libffi.so.6
#13 0x00007fd78801f364 in pygi_invoke_c_callable () from /tmp/apport_sandbox_zFmgT3/usr/lib/python3/dist-packages/gi/_gi.cpython-35m-x86_64-linux-gnu.so
#14 0x00007fd788021048 in pygi_function_cache_invoke () from /tmp/apport_sandbox_zFmgT3/usr/lib/python3/dist-packages/gi/_gi.cpython-35m-x86_64-linux-gnu.so
#15 0x00007fd788015d15 in _callable_info_call () from /tmp/apport_sandbox_zFmgT3/usr/lib/python3/dist-packages/gi/_gi.cpython-35m-x86_64-linux-gnu.so
#16 0x000000000058feae in PyObject_Call ()
#17 0x0000000000514e31 in PyEval_EvalFrameEx ()
#18 0x000000000051498f in PyEval_EvalFrameEx ()
#19 0x0000000000518ca8 in _PyEval_EvalCodeWithName.lto_priv.1327 ()
#20 0x00000000005f800f in PyEval_EvalCode ()
#21 0x0000000000608e12 in run_mod ()
#22 0x000000000060afda in PyRun_FileExFlags ()
#23 0x000000000060b79c in PyRun_SimpleFileExFlags ()
#24 0x000000000062b8f0 in Py_Main ()
#25 0x00000000004cbc9f in main ()