mutter cogl-test-framebuffer-get-bits-gl3 failure

mutter has one failing build test in Mantic. Debian Experimental has the same build test failure but Ubuntu 23.04 (Lunar) does not.

This is reproducible with mutter 44.2-1 from earlier in June so this appears to be triggered by a change in one of the dependencies.

https://launchpad.net/ubuntu/+source/mutter/44.2-2ubuntu1

Build log excerpt
=================

 67/179 mutter:cogl+cogl/conform / cogl-test-framebuffer-get-bits-gl3 RUNNING
>>> LD_LIBRARY_PATH=/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/cogl/cogl:/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/src:/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/cogl/cogl-pango:/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/src/tests:/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/clutter/clutter G_ENABLE_DIAGNOSTIC=0 G_TEST_BUILDDIR=/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/src/tests/cogl/conform G_TEST_SRCDIR=/<<PKGBUILDDIR>>/src/tests/cogl/conform COGL_DRIVER=gl3 MALLOC_PERTURB_=209 MUTTER_TEST_PLUGIN_PATH=/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/src/compositor/plugins/libdefault.so /<<PKGBUILDDIR>>/src/tests/meta-dbus-runner.py -- /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/src/tests/cogl/conform/cogl-test-framebuffer-get-bits
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Starting D-Bus daemons (session & system)...
Launching required services...
Starting mocked services...
Running test case...
TAP version 13
# random seed: R02Scf195b999d71877c99f7f10a5670c4cb
# GLib-GIO-DEBUG: _g_io_module_get_default: Found default implementation memory (GMemorySettingsBackend) for ‘gsettings-backend’
# libmutter-MESSAGE: Running Mutter Test (using mutter 44.2) as a Wayland display server
# libmutter-MESSAGE: Created surfaceless renderer without GPU
# GLib-GIO-DEBUG: _g_io_module_get_default: Found default implementation local (GLocalVfs) for ‘gio-vfs’
# libmutter-MESSAGE: Disabling DMA buffer screen sharing (not hardware accelerated)
# libmutter-MESSAGE: Disabling DMA buffer screen sharing (implicit modifiers not supported)
# libmutter-DEBUG: WL: loaded libnvidia-egl-wayland.so.1:wl_eglstream_controller.
# libmutter-MESSAGE: Using Wayland display name 'mutter-test-display'
Window manager warning: Failed to set environment variable WAYLAND_DISPLAY for gnome-session: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Name "org.gnome.SessionManager" does not exist
1..1
# Start of framebuffer tests
**
ERROR:../src/tests/cogl/conform/test-framebuffer-get-bits.c:39:test_framebuffer_get_bits: assertion failed (cogl_framebuffer_get_alpha_bits (fb_a) >= 1): (0 >= 1)
not ok /framebuffer/get-bits - ERROR:../src/tests/cogl/conform/test-framebuffer-get-bits.c:39:test_framebuffer_get_bits: assertion failed (cogl_framebuffer_get_alpha_bits (fb_a) >= 1): (0 >= 1)
Bail out!
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 67/179 mutter:cogl+cogl/conform / cogl-test-framebuffer-get-bits-gl3 FAIL 1.09s (exit status 250 or signal 122 SIGinvalid)