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-rw-r--r--library/core/src/ffi/c_str.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/library/core/src/ffi/c_str.rs b/library/core/src/ffi/c_str.rs
index 26b88d1e695..201bacb28c7 100644
--- a/library/core/src/ffi/c_str.rs
+++ b/library/core/src/ffi/c_str.rs
@@ -79,9 +79,9 @@ use crate::str;
///
/// [str]: prim@str "str"
#[derive(Hash)]
-#[cfg_attr(not(test), rustc_diagnostic_item = "CStr")]
#[stable(feature = "core_c_str", since = "1.64.0")]
#[rustc_has_incoherent_inherent_impls]
+#[cfg_attr(not(bootstrap), lang = "CStr")]
// FIXME:
// `fn from` in `impl From<&CStr> for Box<CStr>` current implementation relies
// on `CStr` being layout-compatible with `[u8]`.