1 files changed, 7 insertions, 0 deletions
diff --git a/compiler/rustc_builtin_macros/src/errors.rs b/compiler/rustc_builtin_macros/src/errors.rs
index bf0ac3f0ee3..630f9b87bc3 100644
--- a/compiler/rustc_builtin_macros/src/errors.rs
+++ b/compiler/rustc_builtin_macros/src/errors.rs
@@ -20,6 +20,13 @@ pub(crate) struct OneCfgPattern {
 }
 
 #[derive(Diagnostic)]
+#[diag(builtin_macros_alloc_error_must_be_fn)]
+pub(crate) struct AllocErrorMustBeFn {
+    #[primary_span]
+    pub(crate) span: Span,
+}
+
+#[derive(Diagnostic)]
 #[diag(builtin_macros_assert_requires_boolean)]
 pub(crate) struct AssertRequiresBoolean {
     #[primary_span]