gdbus-server-auth test intermittently fails on macOS

Example failed job.

This probably isn’t the same as #2206, as this failure is not using TCP. #2206 is.

The relevant bits of the log:

================================== 264/312 ===================================
test:         glib:gio / gdbus-server-auth
start time:   05:07:46
duration:     120.19s
result:       killed by signal 15 SIGTERM
command:      G_ENABLE_DIAGNOSTIC=1 GIO_MODULE_DIR='' MALLOC_CHECK_=2 G_TEST_SRCDIR=/Users/gitlab-runner/builds/_zbhPJ1A/0/GNOME/glib/gio/tests MALLOC_PERTURB_=52 G_DEBUG=gc-friendly G_TEST_BUILDDIR=/Users/gitlab-runner/builds/_zbhPJ1A/0/GNOME/glib/_build/gio/tests /Users/gitlab-runner/builds/_zbhPJ1A/0/GNOME/glib/_build/gio/tests/gdbus-server-auth
----------------------------------- stdout -----------------------------------
TAP version 13
# random seed: R02Sa19f4b927719d6ac69891153316525fc
1..9
# Start of gdbus tests
# GLib-DEBUG: g_set_user_dirs: Setting HOME to /var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/home
# GLib-DEBUG: g_set_user_dirs: Setting XDG_CACHE_HOME to /var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/cache
# GLib-DEBUG: g_set_user_dirs: Setting XDG_CONFIG_DIRS to /var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/system-config1:/var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/system-config2
# GLib-DEBUG: g_set_user_dirs: Setting XDG_CONFIG_HOME to /var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/config
# GLib-DEBUG: g_set_user_dirs: Setting XDG_DATA_DIRS to /var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/system-data1:/var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/system-data2
# GLib-DEBUG: g_set_user_dirs: Setting XDG_DATA_HOME to /var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/data
# GLib-DEBUG: g_set_user_dirs: Setting XDG_STATE_HOME to /var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/state
# GLib-DEBUG: g_set_user_dirs: Setting XDG_RUNTIME_DIR to /var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus/server-auth/.dirs/runtime
# Testing GDBus server at unix:dir=/var/folders/k2/tsk09n316rjdqy00t06sh8jw0000gp/T/test_gdbus-server-auth_DFKT11/gdbus-server-auth-D07T11 / libdbus client, with flags: external:false anonymous:false sha1:false abstract:false tcp:false
==============================================================================


Summary of Failures:

264/312 glib:gio / gdbus-server-auth                                    TIMEOUT        120.19s   killed by signal 15 SIGTERM