GCI: At their def site, actually wfcheck the where-clause & always eval free lifetime-generic constants#136429

Draft

fmease wants to merge 3 commits intorust-lang:masterfrom fmease:gci-fix-def-site-checks

+58-14

Commits on Feb 3, 2025

Always evaluate free lifetime-generic constants

fmease
and
compiler-errors
committed
GCI: Check where-clauses for well-formedness at the def site
fmease
committed
TyCtxtEnsure::const_eval_poly: Don't try to erase regions twice
fmease
committed