error[E0748]: unterminated raw string
  --> $DIR/raw-byte-string-eof.rs:2:5
   |
LL |     br##"a"#;
   |     ^      - help: consider terminating the string here: `##`
   |     |
   |     unterminated raw string
   |
   = note: this raw string should be terminated with `"##`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0748`.