size = 1   Test.#5 = Foreign.String.unpack_cpp_string Test.#6
size = 1   Test.#6 = "case: failed pattern match"
size = 1   Test.$v#1 = Compiler.Base.error Test.#5
size = 2   Test.f = \#1 -> case #1 of {#2:#3 -> #3; [] -> []; _ -> Test.$v#1}
