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Hello, i'm lollypop dev:
https://github.com/gnumdk/lollypop
Sometimes, when lollypop quits, i get a segfault...
Here bracktrace:
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6b3b528 in _int_free (av=0x7ffff6e65620 <main_arena>, p=<optimized out>, 
 have_lock=0) at malloc.c:3996
3996	malloc.c: Aucun fichier ou dossier de ce type.
(gdb) backtrace
#0 0x00007ffff6b3b528 in _int_free (av=0x7ffff6e65620 <main_arena>, 
 p=<optimized out>, have_lock=0) at malloc.c:3996
#1 0x00000000005eae0f in code_dealloc (co=0x7ffff68be150)
 at ../Objects/codeobject.c:364
#2 0x00000000005f57f7 in func_dealloc (op=0x7ffff4dc4488)
 at ../Objects/funcobject.c:555
#3 0x00000000005f531f in sm_dealloc (sm=0x7ffff4dbd8d0)
 at ../Objects/funcobject.c:908
#4 0x0000000000459acf in free_keys_object (keys=0xb462e0)
 at ../Objects/dictobject.c:369
#5 PyDict_Clear (op=<optimized out>) at ../Objects/dictobject.c:1282
#6 0x000000000045c102 in PyDict_Clear (op=<optimized out>)
 at ../Objects/dictobject.c:1260
#7 0x000000000047b8d8 in type_clear (type=0xb46f28) at ../Objects/typeobject.c:3228
#8 0x000000000052bb3a in delete_garbage (old=<optimized out>, 
 collectable=<optimized out>) at ../Modules/gcmodule.c:866
#9 collect (generation=generation@entry=2, n_collected=n_collected@entry=0x0, 
 n_uncollectable=n_uncollectable@entry=0x0, nofail=nofail@entry=1)
 at ../Modules/gcmodule.c:1032
#10 0x000000000052c651 in _PyGC_CollectNoFail () at ../Modules/gcmodule.c:1638
#11 0x00000000004fbf1d in PyImport_Cleanup () at ../Python/import.c:540
#12 0x000000000050ecb9 in Py_Finalize () at ../Python/pythonrun.c:616
#13 0x000000000051125c in Py_Finalize () at ../Python/pythonrun.c:2795
#14 Py_Exit (sts=sts@entry=0) at ../Python/pythonrun.c:2793
#15 0x000000000041e409 in handle_system_exit () at ../Python/pythonrun.c:1812
#16 0x00000000005115b4 in handle_system_exit () at ../Python/pythonrun.c:1881
#17 PyErr_PrintEx (set_sys_last_vars=<optimized out>) at ../Python/pythonrun.c:1822
#18 0x00000000005123cf in PyErr_Print () at ../Python/pythonrun.c:1718
#19 PyRun_SimpleFileExFlags (fp=0x7ffff6e65620 <main_arena>, 
 filename=0xffffffff <error: Cannot access memory at address 0xffffffff>, 
 closeit=1, flags=0xffff800008d504d0) at ../Python/pythonrun.c:1611
#20 0x0000000000422cbc in run_file (p_cf=<optimized out>, filename=<optimized out>, 
 fp=<optimized out>) at ../Modules/main.c:319
#21 Py_Main (argc=-157933448, argv=0x7ffff6a24180) at ../Modules/main.c:751
#22 0x000000000041f06c in main (argc=2, argv=<optimized out>)
 at ../Modules/python.c:69

The link you gave is broken, can you give a simple code to reproduce the issue?

Currently lollypop seems to be residing at https://gitlab.gnome.org/World/lollypop
However, this issue is filled against a no longer supported version which along with many changes in the C code warrants out-of-date closure, I think. Cédric, please re-open this issue if you're still experiencing this crash on a recent Python version.