1 files changed, 32 insertions, 0 deletions
diff --git a/tests/ui/rust-2021/future-prelude-collision-shadow.rs b/tests/ui/rust-2021/future-prelude-collision-shadow.rs
new file mode 100644
index 00000000000..27891a8d11d
--- /dev/null
+++ b/tests/ui/rust-2021/future-prelude-collision-shadow.rs
@@ -0,0 +1,32 @@
+// edition:2018
+#![warn(rust_2021_prelude_collisions)]
+#![allow(dead_code)]
+#![allow(unused_imports)]
+
+mod m {
+    pub trait TryIntoU32 {
+        fn try_into(self) -> Result<u32, ()>;
+    }
+
+    impl TryIntoU32 for u8 {
+        fn try_into(self) -> Result<u32, ()> {
+            Ok(self as u32)
+        }
+    }
+
+    pub trait AnotherTrick {}
+}
+
+mod d {
+    use crate::m::AnotherTrick as TryIntoU32;
+    use crate::m::*;
+
+    fn main() {
+        // Here, `TryIntoU32` is imported but shadowed, but in that case we don't permit its methods
+        // to be available.
+        let _: u32 = 3u8.try_into().unwrap();
+        //~^ ERROR no method named `try_into` found for type `u8` in the current scope
+    }
+}
+
+fn main() {}