sandbox is broken in 0.4.4.3-alpha

commit d28bfb2c of issue #40020 (closed) doesn't work here at a hardened stable Gentoo Linux - the error is

Jul 27 15:28:29.000 [warn] Directory /var/lib/tor/data cannot be read: Operation not permitted
Jul 27 15:28:29.000 [err] Can't create/check datadirectory /var/lib/tor/data
Jul 27 15:28:29.000 [err] Error initializing keys; exiting

reverting it circumvents the issue here.

# emerge -qpvO glibc
[ebuild   R   ] sys-libs/glibc-2.30-r8  USE="(crypt) multiarch (ssp) (static-libs) -audit -caps (-cet) -compile-locales -custom-cflags -doc -gd -headers-only (-multilib) -nscd -profile (-selinux) -suid -systemtap -test (-vanilla)" 

# uname -a
Linux mr-fox 5.7.10 #13 SMP Wed Jul 22 16:36:05 CEST 2020 x86_64 Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz GenuineIntel GNU/Linux