Error code E0748

A raw string isn't correctly terminated because the trailing # count doesn't match its leading # count.

Erroneous code example:

#![allow(unused)] fn main() { let dolphins = r##"Dolphins!"#; // error! }

To terminate a raw string, you have to have the same number of # at the end as at the beginning. Example:

#![allow(unused)] fn main() { let dolphins = r#"Dolphins!"#; // One `#` at the beginning, one at the end so // all good! }