Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
6d5ec050f4
This PR fixes premise selection silently dropping relevant premises when
the goal was reached via `induction`.
`MVarId.getRelevantConstants` and `MVarId.getConstants` walked the raw
goal type returned by `getType`, which after `induction` is `?motive
arg` with `?motive` an assigned-but-unsubstituted metavariable. The
constant fold treats the metavariable as an opaque leaf, so every
constant in the goal predicate is lost. Instantiating metavariables
first recovers them.
Thanks to Xavier Généreux for the report.
🤖 Prepared with Claude Code
---------
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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