1 files changed, 17 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-22312.rs b/tests/ui/issues/issue-22312.rs
new file mode 100644
index 00000000000..4e359b3412a
--- /dev/null
+++ b/tests/ui/issues/issue-22312.rs
@@ -0,0 +1,17 @@
+use std::ops::Index;
+
+pub trait Array2D: Index<usize> + Sized {
+    fn rows(&self) -> usize;
+    fn columns(&self) -> usize;
+    fn get<'a>(&'a self, y: usize, x: usize) -> Option<&'a <Self as Index<usize>>::Output> {
+        if y >= self.rows() || x >= self.columns() {
+            return None;
+        }
+        let i = y * self.columns() + x;
+        let indexer = &(*self as &dyn Index<usize, Output = <Self as Index<usize>>::Output>);
+        //~^ERROR non-primitive cast
+        Some(indexer.index(i))
+    }
+}
+
+fn main() {}