snapcraft 7.x fails to replace new variables about snapcraft HOT 4 OPEN

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-2623.

This message was autogenerated

from snapcraft.

The problem here is that CRAFT_ARCH_TRIPLET_BUILD_FOR was introduced in craft-parts 1.24.0, but Snapcraft 7.5.x uses craft-parts 1.19.7.
For that particular case you can fallback to CRAFT_ARCH_TRIPLET instead

from snapcraft.

so the env did not get replaced, leaving the _ after the : triggering the slice check. The slice check probably needs to check things before the architecture check. I am not even sure we support slices with architecture tags, so : might also not be allowed for slices specifically

from snapcraft.

I wonder how useful it is to fix this on the slice-verification side, because if a variable didn't get expanded then basically all bets are off: the build would fail later when trying to install gcc-${CRAFT_ARCH_TRIPLET_BUILD_FOR} from apt

from snapcraft.