g_hash_table_steal leaked the MetaMonitorSpec key in the old
compositor->outputs hash table:
==1059254== 62 (32 direct, 30 indirect) bytes in 1 blocks are definitely lost in loss record 8,232 of 13,059
==1059254== at 0x48489F3: calloc (vg_replace_malloc.c:1340)
==1059254== by 0x4C65C19: g_malloc0 (gmem.c:133)
==1059254== by 0x4956FE8: meta_monitor_spec_clone (meta-monitor.c:108)
==1059254== by 0x4A7B9E8: meta_wayland_compositor_update_outputs (meta-wayland-outputs.c:555)
==1059254== by 0x4A7C09E: meta_wayland_outputs_init (meta-wayland-outputs.c:796)
==1059254== by 0x4A63B60: meta_wayland_compositor_new (meta-wayland.c:874)
==1059254== by 0x49B58D0: meta_context_start (meta-context.c:523)
==1059254== by 0x10A8D7: main (mutter.c:148)
==1059254==
==1059254== 62 (32 direct, 30 indirect) bytes in 1 blocks are definitely lost in loss record 8,233 of 13,059
==1059254== at 0x48489F3: calloc (vg_replace_malloc.c:1340)
==1059254== by 0x4C65C19: g_malloc0 (gmem.c:133)
==1059254== by 0x4956FE8: meta_monitor_spec_clone (meta-monitor.c:108)
==1059254== by 0x4A7B9E8: meta_wayland_compositor_update_outputs (meta-wayland-outputs.c:555)
==1059254== by 0x4A7BA8C: on_monitors_changed (meta-wayland-outputs.c:572)
==1059254== by 0x4F5E9BF: g_closure_invoke (gclosure.c:833)
==1059254== by 0x4F72D82: signal_emit_unlocked_R.isra.0 (gsignal.c:3887)
==1059254== by 0x4F747A8: signal_emit_valist_unlocked (gsignal.c:3519)
==1059254== by 0x4F7A665: g_signal_emit_valist (gsignal.c:3262)
==1059254== by 0x4F7A722: g_signal_emit (gsignal.c:3582)
==1059254== by 0x49691BD: meta_monitor_manager_notify_monitors_changed (meta-monitor-manager.c:1241)
==1059254== by 0x496EA8D: meta_monitor_manager_rebuild (meta-monitor-manager.c:3968)
v2:
* Use g_autoptr. (Sebastian Wick, Jonas Ådahl)
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4149>
4284371a26