pmerge --pretend --verbose
[ebuild U ] dev-lang/perl-5.44.0:0/5.44::gentoo [5.42.0-r1:0/5.42::gentoo] USE="gdbm -berkdb -doc -minimal" PERL_FEATURES="ithreads (-debug) -quadmath" 14.4 MiB
[ebuild N ] virtual/perl-Time-HiRes-1.978.0::gentoo
[ebuild N ] dev-perl/Class-XSAccessor-1.190.0-r3::gentoo USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 78.9 KiB
[ebuild N ] dev-perl/Number-Compare-0.30.0-r2::gentoo USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 2.5 KiB
[ebuild N ] dev-perl/Text-Glob-0.110.0-r1::gentoo USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 4.7 KiB
[ebuild N ] dev-perl/File-Find-Rule-0.350.0::gentoo USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 15.8 KiB
[ebuild N ] dev-perl/Devel-CheckOS-2.40.0::gentoo USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 40.9 KiB
[ebuild N ] dev-perl/prefork-1.50.0::gentoo USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 27.8 KiB
[ebuild N ] dev-perl/Number-WithError-1.10.0-r1::gentoo USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 38.0 KiB
[ebuild N ] dev-perl/Statistics-CaseResampling-0.170.0::gentoo USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 57.0 KiB
[ebuild N ] virtual/perl-parent-0.244.0-r1::gentoo
[ebuild N ] dev-perl/Dumbbench-0.505.0::gentoo USE="-examples -test" PERL_FEATURES="ithreads (-debug) -quadmath" 34.0 KiB
Total: 12 packages (11 new, 1 upgrade), Size of downloads: 14.7 MiB
* Running sanity checks...
>>> dev-lang/perl-5.44.0: failed pkg_pretend
/Volumes/Disk 1/gentoo-prefix/usr/lib/pkgcore/lib/pkgcore/ebd/.generated/libs/8/pkg_pretend: line 144: [[: invalid regular expression `': empty (sub)expression
* ERROR: dev-lang/perl-5.44.0:: failed (pretend phase):
* USE flag 'perl_features_ithreads' not in IUSE for dev-lang/perl-5.44.0
*
* Call stack:
* isolated-functions.bash, line 333: called pkg_pretend
* ebuild.bash, line 1834: called use 'perl_features_ithreads'
* pkg_pretend, line 145: called die
*
* Working directory: '/var/tmp/portage'
!!! Sanity checks failed, exiting...
- Wall time
- 0.765 s vs. 0.693 s for portage-ng