add test for normalization in implied bounds query

See https://github.com/rust-lang/rust/issues/109799.

1 files changed, 39 insertions, 0 deletions

diff --git a/tests/ui/implied-bounds/normalization-nested.rs b/tests/ui/implied-bounds/normalization-nested.rs
new file mode 100644
index 00000000000..5f1cbb3f697
--- /dev/null
+++ b/tests/ui/implied-bounds/normalization-nested.rs
@@ -0,0 +1,39 @@
+// Test for normalization of projections that appear in the item bounds
+// (versus those that appear directly in the input types).
+// Both revisions should pass. `lifetime` revision is a bug.
+//
+// revisions: param_ty lifetime
+// [param_ty] check-pass
+// [lifetime] check-fail
+// [lifetime] known-bug: #109799
+
+pub trait Iter {
+    type Item;
+}
+
+#[cfg(param_ty)]
+impl<X, I> Iter for I
+where
+    I: IntoIterator<Item = X>,
+{
+    type Item = X;
+}
+
+#[cfg(lifetime)]
+impl<'x, I> Iter for I
+where
+    I: IntoIterator<Item = &'x ()>,
+{
+    type Item = &'x ();
+}
+
+pub struct Map<I>(I)
+where
+    I: Iter,
+    I::Item: 'static;
+
+pub fn test<'x>(_: Map<Vec<&'x ()>>, s: &'x str) -> &'static str {
+    s
+}
+
+fn main() {}