size = 1   Test.#3 = Foreign.String.unpack_cpp_string Test.#4
size = 1   Test.#4 = "case: failed pattern match"
size = 1   Test.$v#1 = Compiler.Base.error Test.#3
size = 2   Test.f = \#1 -> case #1 of {0 -> 1; 2 -> 3; _ -> Test.$v#1}
