unmapping layer surface crash

[alex-huff]

Problem description

After a layer surface has unmapped itself, labwc will still try to send configure events to the unmapped surface when arranging all the layers. This causes labwc to crash because of a failed assertion in wlr_scene_layer_surface_v1_configure.

Steps to reproduce

To reproduce you need to run a layer shell program that unmaps itself. The kitty terminal has a new feature that does this. With the latest version of kitty installed, bind kitten quick-access-terminal to some keybinding and activate this binding twice. labwc should now have crashed.

labwc build source

Local build

labwc version

labwc 0.8.4-38-g95552c26

labwc environment

From a TTY or some display manager like lightdm

Distribution

Arch Linux

[Consolatis]

Thanks for the report and patch :)