g_test_trap_subprocess(), for Windows support and better robustness
on Unix (fd.o #101362, Simon McVittie)
+• On systemd systems, if ${localstatedir}/dbus/machine-id doesn't exist,
+ instruct systemd-tmpfiles to make it a symbolic link to /etc/machine-id.
+ This prevents the two files from going out of sync on stateless or live
+ images without needing to run dbus-uuidgen, and supports older D-Bus
+ implementations that do not necessarily read /etc/machine-id themselves.
+ (fd.o #101570, Simon McVittie)
+
Fixes:
• Fix a reference leak when blocking on a pending call on a connection