error: invalid format string: expected `'}'` but string was terminated
  --> $DIR/format-string-error.rs:12:5
   |
12 |     println!("{");
   |     ^^^^^^^^^^^^^^
   |
   = note: if you intended to print `{`, you can escape it using `{{`
   = note: this error originates in a macro outside of the current crate (run with RUST_MACRO_BACKTRACE=1 for more info)

error: invalid format string: unmatched `}` found
  --> $DIR/format-string-error.rs:14:5
   |
14 |     println!("}");
   |     ^^^^^^^^^^^^^^
   |
   = note: if you intended to print `}`, you can escape it using `}}`
   = note: this error originates in a macro outside of the current crate (run with RUST_MACRO_BACKTRACE=1 for more info)

error: aborting due to 2 previous errors