Agda-2.3.2.2: test/fail/ShapeIrrelevantIndexNoBecauseOfRecursion.err
ShapeIrrelevantIndexNoBecauseOfRecursion.agda:26,14-15 .a != .b of type Bool when checking that the expression x has type D .b
ShapeIrrelevantIndexNoBecauseOfRecursion.agda:26,14-15 .a != .b of type Bool when checking that the expression x has type D .b