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error: invalid format string: unmatched `}` found
--> $DIR/format-expanded-string.rs:19:13
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LL | format!(concat!("abc}"));
| ^^^^^^^^^^^^^^^ unmatched `}` in format string
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= 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: invalid format string: unmatched `}` found
--> $DIR/format-expanded-string.rs:22:34
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LL | format!(err_with_input_span!(""));
| ^^ unmatched `}` in format string
|
= note: if you intended to print `}`, you can escape it using `}}`
error: aborting due to 2 previous errors
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