another mutex test #1310

Job	Run time
build_debian_bullseye	1m 3s
build_debian_bookworm	1m 0s
build_debian_buster	58s
build_android	7m 43s
build_debian_sid	1m 9s
build_macos_arm	1m 31s
build_macos_intel	3m 9s
build_raspios_bullseye_armhf	20s
build_ubuntu_focal	1m 1s
build_ubuntu_jammy	58s
build_ubuntu_mantic	59s
build_ubuntu_noble	1m 12s
build_windows	13m 10s
check_formatting	11s
check_spelling	15s
create_full_archive	0s
update_nightly_release	0s
	34m 39s

Provide feedback