New upstream version 1.52.0~beta.3+dfsg1

[rustc.git] / library / alloc / src / macros.rs

diff --git a/library/alloc/src/macros.rs b/library/alloc/src/macros.rs
index a64a8b32ad77f54c6bd95af3964c7e50c1e38f01..6a64587a2237fb7059ef3af6a5770b04c481ee6a 100644 (file)
--- a/library/alloc/src/macros.rs
+++ b/library/alloc/src/macros.rs
@@ -107,6 +107,7 @@ macro_rules! vec {
 /// ```
 #[macro_export]
 #[stable(feature = "rust1", since = "1.0.0")]
+#[cfg_attr(not(test), rustc_diagnostic_item = "format_macro")]
 macro_rules! format {
     ($($arg:tt)*) => {{
         let res = $crate::fmt::format($crate::__export::format_args!($($arg)*));