When running under bash 4.4 sys-kernel/dracut-044 has a bug that causes the warning: /usr/lib/dracut/modules.d/90kernel-modules/module-setup.sh: line 13: warning: command substitution: ignored null byte in input ...to repeat many times. See the referenced dracut issue and a similar but unrelated bug in openrc.
Will be fixed in the next release. We should add a blocker for now. Upstream changes are too massive to backport and probably relies on other commits: http://git.kernel.org/cgit/boot/dracut/dracut.git/commit/?id=794b2d2c753489635b922457a5ccb06669f37268
Created attachment 448124 [details, diff] dracut-044-bash-4.4.patch On the other hand this should be easy to fix. Can somebody test attached patch?
That patch is not quite sufficient: 90kernel-network-modules/module-setup.sh also has the same bug. I'll attach a revised patch that also fixes that and that works for me locally. There may still be problems with other modules that I am not including (and hence not testing), though.
Created attachment 448176 [details, diff] Revised patch that also fixes 90kernel-network-modules
Created attachment 448180 [details, diff] dracut-044-bash-4.4.patch Also fix 50drm
Could dracut conflict with bash 4.4 until it is fixed? Yes, I know that I can mask on local system but masks tend to remain even after fix as I forgot to remove them.
(In reply to Maciej Piechotka from comment #6) > Could dracut conflict with bash 4.4 until it is fixed? Yes, I know that I > can mask on local system but masks tend to remain even after fix as I forgot > to remove them. simply put the patch from above in /etc/portage/patches/sys-kernel/dracut-044-r1/ and re-install dracut (works also with paludis), see https://wiki.gentoo.org/wiki//etc/portage/patches
(In reply to Maciej Piechotka from comment #6) > Could dracut conflict with bash 4.4 until it is fixed? Yes, I know that I > can mask on local system but masks tend to remain even after fix as I forgot > to remove them. Note that, as of 4.4_p2, bash will emit a warning no more than once for each command substitution, rather than for every single NUL byte encountered during a substitution. Discarding NUL bytes has always been a property of command substitution in bash. The only difference is that bash now warns about it, on the valid basis that it may be a code smell. As long as dracut does not capture, redirect, match against or - in any way - care about STDERR in any context where the warning is produced, these warnings have no impact other than to alarm or irritate users. In short, making dracut conflict with any version of bash would likely be an overreaction. But if it were to do so, it would make sense to block ~app-shells/bash-4.4 in particular. This atom covers the only versions that will ever be in portage that do not have a bound on the number of NUL byte warnings printed within a substitution, namely 4.4 and 4.4-r1.
So I hit this as well. Please install a temporary blocker so that dracut prevents bash-4.4 on Gentoo. Or bring a patch from https://github.com/dracutdevs/dracut/commit/cc81672cefae136fff760a907d23d27c64539741 reference in the github issue.
Fixed in sys-kernel/dracut-044-r2 Also added a blocker against bash-4.4 in sys-kernel/dracut-044-r1
