1 files changed, 30 insertions, 0 deletions
diff --git a/tests/ui/rust-2021/future-prelude-collision-generic-trait.rs b/tests/ui/rust-2021/future-prelude-collision-generic-trait.rs
new file mode 100644
index 000000000..142ba5520
--- /dev/null
+++ b/tests/ui/rust-2021/future-prelude-collision-generic-trait.rs
@@ -0,0 +1,30 @@
+// See https://github.com/rust-lang/rust/issues/88470
+// run-rustfix
+// edition:2018
+// check-pass
+#![warn(rust_2021_prelude_collisions)]
+#![allow(dead_code)]
+#![allow(unused_imports)]
+
+pub trait PyTryFrom<'v, T>: Sized {
+    fn try_from<V>(value: V) -> Result<&'v Self, T>;
+}
+
+pub trait PyTryInto<T>: Sized {
+    fn try_into(&self) -> Result<&T, i32>;
+}
+
+struct Foo;
+
+impl<U> PyTryInto<U> for Foo
+where
+    U: for<'v> PyTryFrom<'v, i32>,
+{
+    fn try_into(&self) -> Result<&U, i32> {
+        U::try_from(self)
+        //~^ WARNING trait-associated function `try_from` will become ambiguous in Rust 2021
+        //~| this is accepted in the current edition (Rust 2018)
+    }
+}
+
+fn main() {}