1883c9b7eb
Given the derived `Repr` instance for types with parameters, the absence of `Repr Empty` can cause `Repr` instance synthesis to fail. For example, given ```lean inductive Prim (special : Type) where | plus | other : special → Prim special deriving Repr ``` this works: ```lean #eval (Prim.plus : Prim Int) ``` but this fails: ```lean #eval (Prim.plus : Prim Empty) ``` --------- Co-authored-by: Kyle Miller <kmill31415@gmail.com> Co-authored-by: Eric Wieser <wieser.eric@gmail.com> |
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