[Wayland] Qtile crashes after exiting program that played fullscreen video

When using for instance Firefox or mpv to play a fullscreen video, Qtile (current git master) crashes when exiting the program. So in the case of mpv Qtile crashes immediately after the video, but in the case of Firefox I can play multiple Youtube videos and it will only crash after exiting Firefox. In both programs I can also toggle endlessly between fullscreen and windowed (tiled) without problems.

I’ve reproduced this problem after checking out a fresh copy of the git repo by using the wephyr script in the repo after setting up a development environment with dev.sh from the repo.

This is the traceback causing the crash after exiting Firefox:

Exception ignored from cffi callback <function notify_func at 0x7fdde8862b00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
Exception ignored from cffi callback <function notify_func at 0x7fdde8862b00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
Exception ignored from cffi callback <function notify_func at 0x7fdde8862b00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
Exception ignored from cffi callback <function notify_func at 0x7fdde8862b00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
free(): invalid next size (fast)

And this is the traceback after exiting mpv:

Exception ignored from cffi callback <function notify_func at 0x7f09e513eb00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
Exception ignored from cffi callback <function notify_func at 0x7f09e513eb00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
Exception ignored from cffi callback <function notify_func at 0x7f09e513eb00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
Exception ignored from cffi callback <function notify_func at 0x7f09e513eb00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
Exception ignored from cffi callback <function notify_func at 0x7f09e513eb00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
Exception ignored from cffi callback <function notify_func at 0x7f09e513eb00>:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/pywayland/server/listener.py", line 32, in notify_func
    data = listener._signal._data_wrapper(data)
  File "/usr/lib/python3.10/site-packages/wlroots/wlr_types/surface.py", line 26, in __init__
    self.commit_event = Signal(ptr=ffi.addressof(self._ptr.events.commit))
AttributeError: cdata 'void *' has no attribute 'events'
free(): invalid size

[arjan-s]

@m-col I don’t see an option to reopen this issue, but I’m afraid it’s not fixed. I’m now running the current git master with pywayland 0.4.11 and pywlroots 0.15.9.

[m-col]

This should be fixed now with v0.4.11 of pywayland. Please re-open if you update to pywayland and find that it is not fixed.