blame_contract_range.erl:11: Function foo/0 has no local return
blame_contract_range.erl:14: The contract blame_contract_range:bar(atom()) -> 'a' cannot be right because the inferred return for bar('b') on line 12 is 'b'
blame_contract_range.erl:15: The pattern 'a' can never match the type 'b'