Hi.  So, on my latest attempt at a world update today, I am getting a
crazy problem with libpng, with some packages insisting on the use
flag -apng (portage made me put it in), but other packages insisting
on the use flag apng.

Here is the actual portage output:

Total: 232 packages (198 upgrades, 2 downgrades, 2 new, 6 in new
slots, 24 reinstalls, 2 uninstalls), Size of downloads: 3,451,440
KiB^M
Conflict: 3 blocks (all satisfied)^M
^M
!!! Multiple package instances within a single package slot have been
pulled^M
!!! into the dependency graph, resulting in a slot conflict:^M
^M
media-libs/libpng:0^M
^M
  (media-libs/libpng-1.6.37-r2:0/16::gentoo, ebuild scheduled for
  merge) USE="-apng -static-libs" ABI_X86="(64) -32 (-x32)"
  CPU_FLAGS_X86="sse" pulled in by^M
      media-libs/libpng:=[-apng] required by
         (www-client/chromium-98.0.4710.4-r1:0/dev::gentoo, ebuild
         scheduled for merge) USE="cups hangouts js-type-check official
         (pic) proprietary-codecs suid system-harfbuzz system-png
         (-component-build)\ -custom-cflags -debug (-headless) -kerberos
         -pulseaudio -screencast (-selinux) (-system-ffmpeg) -system-icu
         -vaapi -wayland -widevine" ABI_X86="(64)" L10N="am ar bg bn ca
         cs da de el en-GB es es-419 et fa fi fil fr gu he hi hr hu id it
         ja\ kn ko lt lv ml mr ms nb nl pl pt-BR pt-PT ro ru sk sl sr sv
         sw ta te th tr uk vi zh-CN zh-TW"^M
                                 ^^^^^
                                                \
                                                \
                                                ^M
                                                ^M
                                                  
(media-libs/libpng-1.6.37-r2:0/16::gentoo,
                                                  installed) USE="apng 
-abi_riscv_ilp32
                                                  -abi_riscv_ilp32d 
-abi_riscv_lp64
                                                  -abi_riscv_lp64d -static-libs"
                                                  ABI_X86="(64) -32 (-x32)"
                                                  CPU_FLAGS_X86="sse" pulled in 
by^M
                                                      
>=media-libs/libpng-1.6.35:0=[apng]
                                                         required by
                                                         
(www-client/firefox-94.0.2:0/94::gentoo,
                                                         ebuild scheduled for 
merge)
                                                         USE="clang dbus 
gmp-autoupdate
                                                         openh264 system-av1
                                                         system-harfbuzz 
system-icu
                                                         system-jpeg 
system-libevent
                                                         system-webp \-debug 
-eme-free
                                                         -geckodriver -hardened 
-hwaccel
                                                         -jack -lto -pgo 
-pulseaudio
                                                         -screencast (-selinux) 
-sndio
                                                         -system-libvpx 
-wayland -wifi"
                                                         ABI_X86="(64)" 
L10N="-ach -af -an
                                                         -ar -ast -az -be -bg 
-bn -br -bs
                                                         -ca -ca-valencia -cak 
-cs -cy -da
                                                         \-de -dsb -el -en-CA 
-en-GB -eo
                                                         -es-AR -es-CL -es-ES 
-es-MX -et
                                                         -eu -fa -ff -fi -fr 
-fy -ga -gd
                                                         -gl -gn -gu -he -hi 
-hr -hsb -hu
                                                         -hy -ia -id -is -it 
-ja -ka -kab
                                                         -kk -km -kn -ko -lij 
-lt -lv -mk
                                                         -mr -ms -my -nb -ne 
-nl -nn -oc
                                                         -pa -pl -pt-B\R -pt-PT 
-rm -ro -ru
                                                         -sco -si -sk -sl -son 
-sq -sr -sv
                                                         -szl -ta -te -th -tl 
-tr -trs -uk
                                                         -ur -uz -vi -xh -zh-CN 
-zh-TW"^M
                                                                                
           ^^^^
                                                                                
                                \
                                                                                
                                \
                                                                                
                                \
                                                                                
                                ^M
                                                                                
                                    >=media-libs/libpng-1.6.35:0=[apng]
                                                                                
                                    required
                                                                                
                                    by
                                                                                
                                    
(mail-client/thunderbird-91.3.2:0/91::gentoo,
                                                                                
                                    ebuild
                                                                                
                                    scheduled
                                                                                
                                    for
                                                                                
                                    merge)
                                                                                
                                    USE="clang
                                                                                
                                    dbus
                                                                                
                                    openh264
                                                                                
                                    system-av1
                                                                                
                                    system-harfbuzz
                                                                                
                                    system-icu
                                                                                
                                    system-jpeg
                                                                                
                                    system-libevent
                                                                                
                                    system-webp
                                                                                
                                    -debug
                                                                                
                                    -em\e-free
                                                                                
                                    -hardened
                                                                                
                                    -hwaccel
                                                                                
                                    -jack
                                                                                
                                    -lto
                                                                                
                                    (-pgo)
                                                                                
                                    -pulseaudio
                                                                                
                                    (-selinux)
                                                                                
                                    -sndio
                                                                                
                                    -system-libvpx
                                                                                
                                    -wayland
                                                                                
                                    -wifi"
                                                                                
                                    ABI_X86="(64)"
                                                                                
                                    L10N="-af
                                                                                
                                    -ar
                                                                                
                                    -ast
                                                                                
                                    -be
                                                                                
                                    -bg
                                                                                
                                    -br
                                                                                
                                    -ca
                                                                                
                                    -cak
                                                                                
                                    -cs
                                                                                
                                    -cy
                                                                                
                                    -da
                                                                                
                                    -de
                                                                                
                                    -dsb
                                                                                
                                    -el
                                                                                
                                    -en-CA
                                                                                
                                    -en-GB
                                                                                
                                    -es-AR
                                                                                
                                    -es-ES
                                                                                
                                    -et
                                                                                
                                    -eu
                                                                                
                                    -fi
                                                                                
                                    -fr
                                                                                
                                    -fy
                                                                                
                                    -ga
                                                                                
                                    -g\d
                                                                                
                                    -gl
                                                                                
                                    -he
                                                                                
                                    -hr
                                                                                
                                    -hsb
                                                                                
                                    -hu
                                                                                
                                    -id
                                                                                
                                    -is
                                                                                
                                    -it
                                                                                
                                    -ja
                                                                                
                                    -ka
                                                                                
                                    -kab
                                                                                
                                    -kk
                                                                                
                                    -ko
                                                                                
                                    -lt
                                                                                
                                    -lv
                                                                                
                                    -ms
                                                                                
                                    -nb
                                                                                
                                    -nl
                                                                                
                                    -nn
                                                                                
                                    -pa
                                                                                
                                    -pl
                                                                                
                                    -pt-BR
                                                                                
                                    -pt-PT
                                                                                
                                    -rm
                                                                                
                                    -ro
                                                                                
                                    -ru
                                                                                
                                    -sk
                                                                                
                                    -sl
                                                                                
                                    -sq
                                                                                
                                    -sr
                                                                                
                                    -sv
                                                                                
                                    -th
                                                                                
                                    -tr
                                                                                
                                    -uk
                                                                                
                                    -uz
                                                                                
                                    -vi
                                                                                
                                    -zh-CN
                                                                                
                                    -zh-TW"^M
                                                                                
                                                                      ^^^^
                                                                                
                                                                                
           \
                                                                                
                                                                                
           \
                                                                                
                                                                                
           ^M
                                                                                
                                                                                
           ^M

Thanks in advance for any suggestions.

-- 
Your life is like a penny.  You're going to lose it.  The question is:
How do
you spend it?

         John Covici wb2una
         [email protected]

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