1 files changed, 29 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-78957.rs b/tests/ui/issues/issue-78957.rs
new file mode 100644
index 000000000..567c59fd5
--- /dev/null
+++ b/tests/ui/issues/issue-78957.rs
@@ -0,0 +1,29 @@
+#![deny(unused_attributes)]
+
+use std::marker::PhantomData;
+
+pub struct Foo<#[inline] const N: usize>;
+//~^ ERROR attribute should be applied to function or closure
+pub struct Bar<#[cold] const N: usize>;
+//~^ ERROR attribute should be applied to a function
+//~| WARN this was previously accepted
+pub struct Baz<#[repr(C)] const N: usize>;
+//~^ ERROR attribute should be applied to a struct, enum, or union
+//
+pub struct Foo2<#[inline] 'a>(PhantomData<&'a ()>);
+//~^ ERROR attribute should be applied to function or closure
+pub struct Bar2<#[cold] 'a>(PhantomData<&'a ()>);
+//~^ ERROR attribute should be applied to a function
+//~| WARN this was previously accepted
+pub struct Baz2<#[repr(C)] 'a>(PhantomData<&'a ()>);
+//~^ ERROR attribute should be applied to a struct, enum, or union
+//
+pub struct Foo3<#[inline] T>(PhantomData<T>);
+//~^ ERROR attribute should be applied to function or closure
+pub struct Bar3<#[cold] T>(PhantomData<T>);
+//~^ ERROR attribute should be applied to a function
+//~| WARN this was previously accepted
+pub struct Baz3<#[repr(C)] T>(PhantomData<T>);
+//~^ ERROR attribute should be applied to a struct, enum, or union
+
+fn main() {}