In a multilib autobuilder build: Error: Transaction check error: file /usr/share/X11/locale/C/Compose conflicts between attempted installs of lib32-libx11-locale-1:1.6.8-r0.x86 and libx11-locale-1:1.6.8-r0.core2_64 file /usr/share/X11/locale/C/XLC_LOCALE conflicts between attempted installs of lib32-libx11-locale-1:1.6.8-r0.x86 and libx11-locale-1:1.6.8-r0.core2_64 file /usr/share/X11/locale/am_ET.UTF-8/Compose conflicts between attempted installs of lib32-libx11-locale-1:1.6.8-r0.x86 and libx11-locale-1:1.6.8-r0.core2_64 file /usr/share/X11/locale/am_ET.UTF-8/XLC_LOCALE conflicts between attempted installs of lib32-libx11-locale-1:1.6.8-r0.x86 and libx11-locale-1:1.6.8-r0.core2_64 file /usr/share/X11/locale/armscii-8/Compose conflicts between attempted installs of lib32-libx11-locale-1:1.6.8-r0.x86 and libx11-locale-1:1.6.8-r0.core2_64 file /usr/share/X11/locale/armscii-8/XLC_LOCALE conflicts between attempted installs of lib32-libx11-locale-1:1.6.8-r0.x86 and libx11-locale-1:1.6.8-r0.core2_64 [...] Those files should have been identical, so we're not sure what happened here. Doesn't happen repeatedly, might be related to hash equiv.
Hasn't happened since, maybe it was a bug in the old hash equiv code?