x11-libs/extest needs adaptation to slotted Rust

[thesamesam]

A user reported the following world upgrade output:

# emerge -uD --tree --changed-use  @world 

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

Calculating dependencies  
 * IMPORTANT: 3 news items need reading for repository 'gentoo'.
 * Use eselect news read to view new items.

. ...... done!
Dependency resolution took 35.44 s (backtrack: 0/20).

[nomerge       ] app-emulation/protontricks-1.12.0 
[nomerge       ]  app-emulation/winetricks-20240105-r1 
[nomerge       ]   virtual/wine-0-r10 
[ebuild  NS    ]    app-emulation/wine-vanilla-9.21 [9.17, 9.18, 9.19]
[nomerge       ] media-gfx/nomacs-3.16.224-r6 
[ebuild   R    ]  media-libs/opencv-4.9.0-r2  USE="qt6*" PYTHON_TARGETS="-python3_13%" 
[ebuild     U  ] sci-electronics/kicad-templates-8.0.6 [8.0.5]
[ebuild     U  ] sci-electronics/kicad-symbols-8.0.6 [8.0.5]
[ebuild     U  ] sci-electronics/kicad-packages3d-8.0.6 [8.0.5]
[ebuild     U  ] sci-electronics/kicad-footprints-8.0.6 [8.0.5]
[ebuild     U  ] net-im/zoom-6.2.6.2503 [6.2.3.2056]
[ebuild     U  ] media-gfx/wings-2.3 [2.2.6.1]
[ebuild     U *] media-gfx/gimp-2.99.18-r2 [2.99.18-r1]
[ebuild     U  ] gui-libs/xdg-desktop-portal-lxqt-1.1.0 [1.0.2]
[ebuild     U  ] gui-apps/waybar-0.11.0 [0.10.4]
[nomerge       ] app-emulation/virt-manager-4.1.0-r1 
[ebuild     U  ]  dev-python/libvirt-python-10.8.0 [10.6.0]
[ebuild     U  ]   app-emulation/libvirt-10.8.0 [10.6.0-r1]
[nomerge       ] sci-electronics/kicad-templates-8.0.6 [8.0.5]
[ebuild     U  ]  sci-electronics/kicad-8.0.6 [8.0.5]
[ebuild     U  ] app-emulation/qemu-9.1.1 [9.1.0]
[nomerge       ] media-gfx/gimp-2.99.18-r2 [2.99.18-r1]
[ebuild     U  ]  media-libs/gegl-0.4.50 [0.4.48]
[nomerge       ] media-libs/libsdl-1.2.68 
[nomerge       ]  media-libs/libsdl2-2.30.7-r1 
[ebuild     U  ]   media-video/pipewire-1.2.6 [1.2.5]
[nomerge       ] gui-apps/gtkgreet-0.8 
[ebuild     U  ]  gui-libs/greetd-0.10.3-r1 [0.10.3] USE="(-selinux)" 
[nomerge       ] sys-process/glances-4.1.2.1 
[ebuild     U  ]  dev-python/orjson-3.10.11-r1 [3.10.11]
[ebuild     U  ] x11-terms/alacritty-0.14.0-r1 [0.14.0]
[ebuild     U  ] x11-misc/pcmanfm-qt-2.1.0 [2.0.0]
[ebuild     U  ] sys-kernel/linux-firmware-20241017-r3 [20240909-r1]
[ebuild  NS    ] sys-kernel/gentoo-sources-6.11.7 [6.10.8, 6.10.10, 6.11.0, 6.11.2, 6.11.3, 6.11.5-r1, 6.11.6]
[ebuild     U  ] sys-fs/bcachefs-tools-1.13.0-r1 [1.13.0]
[ebuild     U  ] dev-python/setuptools-rust-1.10.2-r1 [1.10.2]
[ebuild     U  ] app-office/libreoffice-24.2.7.2 [24.2.6.2] PYTHON_SINGLE_TARGET="-python3_13%" 
[nomerge       ] x11-misc/picom-12.3 
[nomerge       ]  dev-ruby/asciidoctor-2.0.23 
[nomerge       ]   dev-lang/ruby-3.1.6-r1 
[ebuild     U  ]    dev-ruby/json-2.8.1 [2.7.6]
[nomerge       ] x11-misc/pcmanfm-qt-2.1.0 [2.0.0]
[nomerge       ]  kde-plasma/layer-shell-qt-6.2.3 
[ebuild     U  ]   kde-frameworks/breeze-icons-6.8.0 [6.7.0]
[nomerge       ] gui-libs/xdg-desktop-portal-lxqt-1.1.0 [1.0.2]
[ebuild     U  ]  kde-frameworks/kwindowsystem-6.8.0 [6.7.0]
[ebuild     U  ]   dev-qt/qtdeclarative-6.7.3-r4 [6.7.3-r2]
[ebuild     U  ]  x11-libs/libfm-qt-2.1.0 [2.0.2-r1]
[ebuild     U  ]   lxqt-base/lxqt-menu-data-2.1.0 [2.0.0]
[ebuild     U  ]    dev-util/lxqt-build-tools-2.1.0 [2.0.0-r1]
[ebuild     U  ] sys-libs/compiler-rt-19.1.3-r1 [19.1.3]
[nomerge       ] x11-libs/pixman-0.44.0 
[nomerge       ]  dev-build/meson-format-array-0 
[nomerge       ]   dev-lang/python-3.12.7_p1 
[nomerge       ]    dev-tcltk/tix-8.4.3-r4 
[nomerge       ]     dev-build/libtool-2.5.3 
[nomerge       ]      dev-build/automake-1.17-r1 
[nomerge       ]       dev-lang/perl-5.40.0 
[nomerge       ]        app-admin/perl-cleaner-2.31-r2 
[nomerge       ]         sys-apps/portage-3.0.66.1-r1 
[nomerge       ]          app-crypt/gnupg-2.4.6-r1 
[nomerge       ]           app-crypt/pinentry-1.3.1 
[nomerge       ]            app-crypt/gcr-4.2.1 
[nomerge       ]             gui-libs/gtk-4.14.4-r1 
[nomerge       ]              media-libs/mesa-24.2.6-r1 [24.2.6]
[nomerge       ]               sys-devel/clang-18.1.8-r6 
[nomerge       ]                sys-devel/clang-runtime-18.1.8 
[ebuild     U  ]                 sys-libs/compiler-rt-18.1.8-r2 [18.1.8-r1]
[ebuild     U  ]              gnome-base/librsvg-2.58.5 [2.58.2]
[ebuild     U  ]              media-libs/mesa-24.2.6-r1 [24.2.6]
[ebuild     U  ]               dev-util/bindgen-0.70.1-r1 [0.70.1]
[nomerge       ] dev-ruby/rdoc-6.7.0 
[nomerge       ]  dev-ruby/racc-1.8.1 
[nomerge       ]   dev-lang/ruby-3.1.6-r1 
[nomerge       ]    dev-ruby/irb-1.14.1 
[ebuild     U  ]     dev-ruby/reline-0.5.11 [0.5.10]
[nomerge       ] app-crypt/gcr-4.2.1 
[ebuild     U  ]  app-crypt/libsecret-0.21.4-r1 [0.21.4] USE="gcrypt%*" 
[nomerge       ] dev-python/jupyterlab-4.2.5 
[nomerge       ]  dev-python/jupyterlab-server-2.27.3 
[nomerge       ]   dev-python/jsonschema-4.23.0 
[ebuild     U  ]    dev-python/rpds-py-0.21.0-r1 [0.21.0]
[nomerge       ] dev-python/jupyterlab-4.2.5 
[nomerge       ]  dev-python/jupyter-server-2.14.2 
[nomerge       ]   dev-python/nbformat-5.10.4 
[nomerge       ]    dev-python/jsonschema-4.23.0 
[nomerge       ]     dev-python/referencing-0.35.1 
[nomerge       ]      dev-python/rpds-py-0.21.0-r1 [0.21.0]
[nomerge       ]       dev-lang/rust-1.82.0-r100 [1.82.0] LLVM_SLOT="19%*" 
[blocks b      ]        dev-lang/rust:stable ("dev-lang/rust:stable" is soft blocking dev-lang/rust-bin-1.82.0-r100, dev-lang/rust-common-1.82.0, dev-lang/rust-1.82.0-r100)
[uninstall     ]         dev-lang/rust-1.82.0 
[ebuild  NS    ]       dev-lang/rust-1.82.0-r100 [1.82.0] LLVM_SLOT="19%*" 
[nomerge       ] dev-python/jupyterlab-4.2.5 
[nomerge       ]  dev-python/tornado-6.4.1 
[nomerge       ]   dev-python/twisted-24.10.0 
[nomerge       ]    dev-python/service-identity-24.2.0 
[ebuild     U  ]     dev-python/cryptography-43.0.3-r1 [43.0.3]
[ebuild     U  ]      dev-util/maturin-1.7.4-r1 [1.7.4]
[ebuild  N     ]       dev-lang/rust-bin-1.82.0-r100  USE="rustfmt (-big-endian) -clippy -doc (-prefix) -rust-analyzer -rust-src -verify-sig" ABI_X86="32 (64) (-x32)" CPU_FLAGS_X86="sse2" LLVM_SLOT="19" 
[nomerge       ] gnome-extra/zenity-4.0.3 
[nomerge       ]  gui-libs/libadwaita-1.5.3 
[nomerge       ]   gui-libs/gtk-4.14.4-r1 
[ebuild     U  ]    app-text/iso-codes-4.17.0 [4.16.0]
[nomerge       ] dev-java/openjdk-jre-bin-8.432_p06 
[nomerge       ]  dev-java/java-config-2.3.4 
[nomerge       ]   sys-apps/portage-3.0.66.1-r1 
[nomerge       ]    app-portage/gemato-20.6 
[nomerge       ]     dev-python/requests-2.32.3 
[nomerge       ]      dev-python/setuptools-74.1.3-r1 
[ebuild     U  ]       dev-python/wheel-0.45.0 [0.44.0] PYTHON_TARGETS="-python3_13t%" 
[nomerge       ] dev-python/setuptools-rust-1.10.2-r1 [1.10.2]
[nomerge       ]  dev-lang/rust-1.82.0-r100 [1.82.0] LLVM_SLOT="19%*" 
[ebuild  N     ]   dev-lang/rust-common-1.82.0  USE="-verify-sig" 
[nomerge       ] xfce-extra/thunar-vcs-plugin-0.2.0-r1 
[nomerge       ]  dev-vcs/subversion-1.14.3 
[nomerge       ]   dev-build/automake-1.17-r1 
[nomerge       ]    sys-apps/help2man-1.49.3 
[nomerge       ]     dev-perl/Locale-gettext-1.70.0-r1 
[nomerge       ]      sys-devel/gettext-0.22.5 
[nomerge       ]       dev-libs/libxml2-2.12.8 
[nomerge       ]        dev-lang/python-3.12.7_p1 
[ebuild     U  ]         dev-python/ensurepip-pip-24.3.1 [24.2]

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

app-emulation/libvirt:0

  (app-emulation/libvirt-10.8.0:0/10.8.0::gentoo, ebuild scheduled for merge) USE="bash-completion caps libvirtd nls qemu udev virt-network -apparmor -audit -dtrace -firewalld -fuse -glusterfs -iscsi -iscsi-direct -libssh -libssh2 -lvm -lxc -nbd -nfs -numa (-openvz) -parted -pcap -policykit -rbd -sasl (-selinux) -test -verify-sig -virtiofsd -virtualbox -wireshark-plugins -xen -zfs" ABI_X86="(64)" pulled in by
    app-emulation/libvirt:0/10.8.0 required by (dev-python/libvirt-python-10.8.0:0/0::gentoo, ebuild scheduled for merge) USE="-debug -examples -test -verify-sig" ABI_X86="(64)" PYTHON_TARGETS="python3_12 -python3_10 -python3_11 -python3_13"
                         ^^^^^^^^^                                                                                                                                                                                                                

  (app-emulation/libvirt-10.6.0-r1:0/10.6.0::gentoo, installed) USE="bash-completion caps libvirtd nls qemu udev virt-network -apparmor -audit -dtrace -firewalld -fuse -glusterfs -iscsi -iscsi-direct -libssh -libssh2 -lvm -lxc -nbd -nfs -numa (-openvz) -parted -pcap -policykit -rbd -sasl (-selinux) -test -verify-sig -virtiofsd -virtualbox -wireshark-plugins -xen -zfs" ABI_X86="(64)" pulled in by
    >=app-emulation/libvirt-2.3.0:0/10.6.0= required by (app-emulation/libvirt-glib-5.0.0:0/0::gentoo, installed) USE="introspection vala -gtk-doc -test" ABI_X86="(64)"
                                 ^^^^^^^^^^                                                                                                                              


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.

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


The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by virtual/rust-1.82.0::gentoo
# required by x11-libs/extest-1.0.2::steam-overlay
# required by games-util/steam-launcher-1.0.0.81::steam-overlay
# required by @selected
# required by @world (argument)
>=dev-lang/rust-bin-1.82.0-r100 rustfmt

Use --autounmask-write to write changes to config files (honoring
CONFIG_PROTECT). Carefully examine the list of proposed changes,
paying special attention to mask or keyword changes that may expose
experimental or unstable packages.

 * In order to avoid wasting time, backtracking has terminated early
 * due to the above autounmask change(s). The --autounmask-backtrack=y
 * option can be used to force further backtracking, but there is no
 * guarantee that it will produce a solution.

!!! The following installed packages are masked:
- virtual/rust-1.82.0::gentoo (masked by: package.mask)
/var/db/repos/gentoo/profiles/package.mask:
# Matt Jolly <[email protected]> (2024-11-09)
# The legacy Rust ebuilds are no longer maintained and have been
# replaced by the new slotted Rust. Removal in 30 days.

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

The issue is that x11-libs/extest needs to be adapted to new slotted Rust (drop dep on virtual/rust, see examples in ::gentoo for multilib - although we may be tweaking it a bit later).