Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
03bd8847dc
This PR fixes the termination checker reporting errors at the wrong recursive call site when a function contains structurally-identical recursive calls at different source locations. The `_recApp` `MData` attached to recursive applications carried the attached `Syntax`, but two structurally-equal `MData` wrappers could be merged by hashconsing/simplification, so the syntax of the first call ended up associated with both call sites. We now also store the source byte position as `_recAppPos`, which keeps the wrappers distinct. Closes #13444. |
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