doErrorMsg.lean:4:2-4:13: error: Type mismatch
  IO.getStdin
has type
  BaseIO IO.FS.Stream
but is expected to have type
  IO Unit
doErrorMsg.lean:16:19-16:21: error: Type mismatch
  f1
has type
  ExceptT String (StateT Nat Id) Nat
but is expected to have type
  ExceptT String (StateT Nat Id) String
doErrorMsg.lean:20:19-20:24: error: Type mismatch
  f2 10
has type
  ExceptT String (StateT Nat Id) Nat
but is expected to have type
  ExceptT String (StateT Nat Id) String
doErrorMsg.lean:24:10-24:12: error: Type mismatch
  f2
has type
  Nat → ExceptT String (StateT Nat Id) Nat
but is expected to have type
  ExceptT String (StateT Nat Id) ?m
doErrorMsg.lean:25:2-25:4: error: Type mismatch
  f1
has type
  ExceptT String (StateT Nat Id) Nat
but is expected to have type
  ExceptT String (StateT Nat Id) String
doErrorMsg.lean:29:7-29:12: error: Type mismatch
  false
has type
  Bool
but is expected to have type
  Nat
doErrorMsg.lean:30:2-30:3: error: Type mismatch
  n
has type
  Nat
but is expected to have type
  Char
doErrorMsg.lean:30:14-30:19: error: Type mismatch
  false
has type
  Bool
but is expected to have type
  Nat
doErrorMsg.lean:31:13-31:18: error: Application type mismatch: The argument
  false
has type
  Bool
but is expected to have type
  Nat
in the application
  Prod.mk false
doErrorMsg.lean:32:3-32:13: error: Type mismatch
  n
has type
  Nat
but is expected to have type
  Char