add inherent-method-collision test

1 files changed, 15 insertions, 0 deletions

diff --git a/src/test/ui/rust-2021/inherent-method-collision.rs b/src/test/ui/rust-2021/inherent-method-collision.rs
new file mode 100644
index 00000000000..c638351d5fc
--- /dev/null
+++ b/src/test/ui/rust-2021/inherent-method-collision.rs
@@ -0,0 +1,15 @@
+// Test that we do NOT warn for inherent methods invoked via `T::` form.
+//
+// check-pass
+
+#![deny(future_prelude_collision)]
+
+pub struct MySeq {}
+
+impl MySeq {
+    pub fn from_iter(_: impl IntoIterator<Item = u32>) {}
+}
+
+fn main() {
+    MySeq::from_iter(Some(22));
+}