Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
8165ecc1db
This PR fixes a bug in the equality-resolution procedure used by `grind`. The procedure now performs a topological sort so that every simplified theorem declaration is emitted **before** any place where it is referenced. Previously, applying equality resolution to ```lean h : ∀ x, p x a → ∀ y, p y b → x ≠ y ``` in the example ```lean example (p : Nat → Nat → Prop) (a b c : Nat) (h : ∀ x, p x a → ∀ y, p y b → x ≠ y) (h₁ : p c a) (h₂ : p c b) : False := by grind ``` caused `grind` to produce the incorrect term ```lean p ?y a → ∀ y, p y b → False ``` The patch eliminates this error, and the following correct simplified theorem is generated ```lean ∀ y, p y a → p y b → False ``` |
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