Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
eba5a5a6ef
This PR fixes the `reduceArity` compiler pass to consider over-applications to functions that have their arity reduced. Previously, this pass assumed that the amount of arguments to applications was always the same as the number of parameters in the signature. This is usually true, since the compiler eagerly introduces parameters as long as the return type is a function type, resulting in a function with a return type that isn't a function type. However, for dependent types that sometimes are function types and sometimes not, this assumption is broken, resulting in the additional parameters to be dropped. Closes #11131 |
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