(Rust) Escaped double quotations in string at attribute are not highlighted properly

Describe the issue

Escaped double quotations in string at attributes are not treated as a escaped character but a normal quotation.

Which language seems to have the issue?

Rust

Sample Code to Reproduce

#[derive(ThisError)]
enum MyError {
  #[error("\" appears in a string")]
  UnexpectedDoubleQuote
}

fn main() {}

sample at jsfiddle

Expected behavior

The escaped double quotation \" shouldn't be treated as a normal double quotation.