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error: expected string literal or `transparent`
--> tests/ui/concat-display.rs:8:17
|
8 | #[error(concat!("invalid ", $what))]
| ^^^^^^
...
13 | error_type!(Error, "foo");
| ------------------------- in this macro invocation
|
= note: this error originates in the macro `error_type` (in Nightly builds, run with -Z macro-backtrace for more info)