mutual
record A where
constructor MkA
foo : B
record B where
constructor MkB
bar : Maybe A
%runElab derive "A" [Generic, Meta, Eq, Show]
%runElab derive "B" [Generic, Meta, Eq, Show]
results in
Error: While processing right hand side of implEqA. Can't find an implementation for POP_ Type Eq [[B]].
results in