This PR fixes an internal `grind` error where `mkEqProof` is invoked with terms of different types. When equivalence classes contain heterogeneous equalities (e.g., `0 : Fin 3` and `0 : Fin 2` merged via `HEq`), `closeGoalWithValuesEq` would call `mkEqProof` on terms with incompatible types, triggering an internal error. Closes #12140 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com> |
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