error[E0277]: the trait bound `Error: std::convert::From<std::option::NoneError>` is not satisfied
  --> src/main.rs:83:25
   |
83 |         .with_extension(source_file.extension()?.to_str()?.to_owned() + ".xmp");
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::convert::From<std::option::NoneError>` is not implemented for `Error`
   |
   = help: the following implementations were found:
             <Error as std::convert::From<&'a str>>
             <Error as std::convert::From<ErrorKind>>
             <Error as std::convert::From<std::io::Error>>
             <Error as std::convert::From<std::num::ParseIntError>>
             <Error as std::convert::From<std::string::String>>
   = note: required by `std::convert::From::from`

error[E0277]: the trait bound `Error: std::convert::From<std::option::NoneError>` is not satisfied
  --> src/main.rs:83:25
   |
83 |         .with_extension(source_file.extension()?.to_str()?.to_owned() + ".xmp");
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::convert::From<std::option::NoneError>` is not implemented for `Error`
   |
   = help: the following implementations were found:
             <Error as std::convert::From<&'a str>>
             <Error as std::convert::From<ErrorKind>>
             <Error as std::convert::From<std::io::Error>>
             <Error as std::convert::From<std::num::ParseIntError>>
             <Error as std::convert::From<std::string::String>>
   = note: required by `std::convert::From::from`