Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
This PR makes the specializer (correctly) share more cache keys across invocations, causing us to produce less code bloat. We observed that in functions with lots of specialization, sometimes cache keys are defeq but not BEq because one has unused let decls (introduced by specialization) that the other doesn't. This PR resolves this conflict by erasing unused let decls from specializer cache keys. |
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