hyzoran@Kyrica-PC ~ $ sudo emerge -av --oneshot portage

 * IMPORTANT: 9 news items need reading for repository 'gentoo'.
 * Use eselect news read to view new items.


These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  N     ] dev-python/pyblake2-1.1.0::gentoo  PYTHON_TARGETS="python2_7 python3_5 (-pypy) -python3_4 -python3_6" 123 KiB
[ebuild     U  ] sys-apps/portage-2.3.19-r1::gentoo [2.3.8::gentoo] USE="(ipc) native-extensions xattr -build -doc -epydoc (-selinux) (-linguas_ru%)" PYTHON_TARGETS="python2_7 python3_5* -pypy -python3_4* -python3_6" 933 KiB

Total: 2 packages (1 upgrade, 1 new), Size of downloads: 1,056 KiB

!!! Multiple package instances within a single package slot have been pulled
!!! into the dependency graph, resulting in a slot conflict:

sys-apps/portage:0

  (sys-apps/portage-2.3.19-r1:0/0::gentoo, ebuild scheduled for merge) pulled in by
    sys-apps/portage (Argument)

  (sys-apps/portage-2.3.8:0/0::gentoo, installed) pulled in by
    sys-apps/portage[python_targets_pypy(-)?,python_targets_python2_7(-)?,python_targets_python3_4(-)?,python_targets_python3_5(-)?,python_targets_python3_6(-)?,-python_single_target_pypy(-),-python_single_target_python2_7(-),-python_single_target_python3_4(-),-python_single_target_python3_5(-),-python_single_target_python3_6(-)] required by (app-portage/gentoolkit-0.4.0:0/0::gentoo, installed)

    sys-apps/portage[python_targets_python2_7(-)?,python_targets_python3_4(-)?,python_targets_python3_5(-)?,python_targets_python3_6(-)?,-python_single_target_python2_7(-),-python_single_target_python3_4(-),-python_single_target_python3_5(-),-python_single_target_python3_6(-)] required by (dev-java/java-config-2.2.0-r3:2/2::gentoo, installed)



It may be possible to solve this problem by using package.mask to
prevent one of those packages from being selected. However, it is also
possible that conflicting dependencies exist such that they are
impossible to satisfy simultaneously.  If such a conflict exists in
the dependencies of two different packages, then those packages can
not be installed simultaneously. You may want to try a larger value of
the --backtrack option, such as --backtrack=30, in order to see if
that will solve this conflict automatically.

For more information, see MASKED PACKAGES section in the emerge man
page or refer to the Gentoo Handbook.


!!! The following installed packages are masked:
- dev-qt/qtwebkit-4.8.7::gentoo (masked by: package.mask)
/usr/portage/profiles/package.mask:
# Andreas Sturmlechner <asturm@gentoo.org> (16 Nov 2017)
# Qt4WebKit is ancient and full of security holes.
# Masked for removal in 30 days. Bug #620684

- dev-util/kdevplatform-5.1.1::gentoo (masked by: package.mask)
/usr/portage/profiles/package.mask:
# Andreas Sturmlechner <asturm@gentoo.org> (05 Jan 2018)
# Masked for removal in 30 days, merged into dev-util/kdevelop

- sys-devel/gcc-5.4.0-r3::gentoo (masked by: package.mask)
/usr/portage/profiles/releases/17.0/package.mask:
# Andreas K. Huettel <dilfridge@gentoo.org> (27 May 2017)
# In the 17.0 profiles we assume that our system compiler uses C++14
# or later as default language setting. This means it has to be at
# least GCC 6. If you need an older compiler for specific purposes,
# feel free to unmask it, however, using it for normal emerging of
# packages is neither recommended nor supported in any way.

- sys-devel/binutils-2.28.1::gentoo (masked by: package.mask)
/usr/portage/profiles/package.mask:
# Michał Górny <mgorny@gentoo.org>, Andreas K. Hüttel <dilfridge@gentoo.org>,
# Matthias Maier <tamiko@gentoo.org> (21 May 2017)
# These old versions of toolchain packages (binutils, gcc, glibc) are no
# longer officially supported and are not suitable for general use. Using
# these packages can result in build failures (and possible breakage) for
# many packages, and may leave your system vulnerable to known security
# exploits.
# If you still use one of these old toolchain packages, please upgrade (and
# switch the compiler / the binutils) ASAP. If you need them for a specific
# (isolated) use case, feel free to unmask them on your system.
# (updated 27 Dec 2017 with gcc < 5.4)

- sys-libs/glibc-2.23-r4::gentoo (masked by: package.mask)
- sys-kernel/gentoo-sources-4.12.12::gentoo (masked by: package.mask)
/usr/portage/profiles/package.mask:
# Alice Ferrazzi <alicef@gentoo.org> (30 Dec 2017)
# Masked for removal in 30 days.
# Upstream is no more backporting security fixes for 4.12.
# For a more stable kernel please downgrade to 4.9
# or move to 4.14(unstable) if it works for you.