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diff --git a/src/test/ui/attributes/attrs-with-no-formal-in-generics-2.rs b/src/test/ui/attributes/attrs-with-no-formal-in-generics-2.rs
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+++ b/src/test/ui/attributes/attrs-with-no-formal-in-generics-2.rs
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+// This test checks variations on `<#[attr] 'a, #[oops]>`, where
+// `#[oops]` is left dangling (that is, it is unattached, with no
+// formal binding following it).
+
+#![feature(rustc_attrs)]
+
+struct RefAny<'a, T>(&'a T);
+
+impl<#[rustc_dummy] 'a, #[rustc_dummy] T, #[oops]> RefAny<'a, T> {}
+//~^ ERROR trailing attribute after generic parameter
+
+fn main() {}