| error: invalid format string: unmatched `}` found | |
| --> $DIR/issue-86085.rs:4:12 | |
| | | |
| LL | format ! ( concat ! ( r#"lJ�.�"# , "r} {}" ) ) ; | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unmatched `}` in format string | |
| | | |
| = note: if you intended to print `}`, you can escape it using `}}` | |
| error: aborting due to 1 previous error | |