Regression: libmutter segfault with Java applications
Using ccab0f47 with Java applications (Jetbrains IDEs) causes a segfault in libmutter. The oldest working commit for me is a3a97621 but I haven't checked these 29 commits in between (Edit: Bisected to 2db94e2e, see comments).
Also see this thread on Arch Linux forums for more people with the same problem.
This is on X, I don't know if it's also happening under Wayland.