SCase15.hs:11:14: error: [GHC-39584]
    " SCase15.hs:16:20: Parse error in pattern: _

    " In the quasi-quotation:
        [sCase|Expr e of
               Zero          -> 0
               Num i         -> i
               Var s         -> ite (s .== "a") 1 2
               Add a b       -> t e + t b
               _ _ -> 3
      |]
   |
11 | t e = [sCase|Expr e of
   |              ^^^^^^^^^...