Only define rustc_diagnostic_item format_macro in not(test).

2021-02-14 20:03:13 +01:00 · 2021-02-14 20:03:13 +01:00 · daa371d189
commit daa371d189
parent 2a0c42450e
1 changed files with 1 additions and 1 deletions
--- a/library/alloc/src/macros.rs
+++ b/library/alloc/src/macros.rs
@ -107,7 +107,7 @@ macro_rules! vec {
 /// ```
 #[macro_export]
 #[stable(feature = "rust1", since = "1.0.0")]
-#[rustc_diagnostic_item = "format_macro"]
+#[cfg_attr(not(test), rustc_diagnostic_item = "format_macro")]
 macro_rules! format {
    ($($arg:tt)*) => {{
        let res = $crate::fmt::format($crate::__export::format_args!($($arg)*));