| error: invalid format string: unmatched `}` found | |
| --> $DIR/format-concat-span.rs:13:13 | |
| | | |
| LL | format!(concat!("abc}")); | |
| | ^^^^^^^^^^^^^^^ unmatched `}` in format string | |
| | | |
| = note: if you intended to print `}`, you can escape it using `}}` | |
| = note: this error originates in the macro `concat` (in Nightly builds, run with -Z macro-backtrace for more info) | |
| error: aborting due to previous error | |