1 files changed, 35 insertions, 0 deletions
diff --git a/tests/ui/inference/auxiliary/inference_unstable_iterator.rs b/tests/ui/inference/auxiliary/inference_unstable_iterator.rs
new file mode 100644
index 00000000000..04bc0b1a8ac
--- /dev/null
+++ b/tests/ui/inference/auxiliary/inference_unstable_iterator.rs
@@ -0,0 +1,35 @@
+#![feature(staged_api)]
+#![feature(arbitrary_self_types)]
+
+#![stable(feature = "ipu_iterator", since = "1.0.0")]
+
+#[stable(feature = "ipu_iterator", since = "1.0.0")]
+pub trait IpuIterator {
+    #[unstable(feature = "ipu_flatten", issue = "99999")]
+    fn ipu_flatten(&self) -> u32 {
+        0
+    }
+
+    #[unstable(feature = "ipu_flatten", issue = "99999")]
+    fn ipu_by_value_vs_by_ref(self) -> u32 where Self: Sized {
+        0
+    }
+
+    #[unstable(feature = "ipu_flatten", issue = "99999")]
+    fn ipu_by_ref_vs_by_ref_mut(&self) -> u32 {
+        0
+    }
+
+    #[unstable(feature = "ipu_flatten", issue = "99999")]
+    fn ipu_by_mut_ptr_vs_by_const_ptr(self: *mut Self) -> u32 {
+        0
+    }
+
+    #[unstable(feature = "assoc_const_ipu_iter", issue = "99999")]
+    const C: i32;
+}
+
+#[stable(feature = "ipu_iterator", since = "1.0.0")]
+impl IpuIterator for char {
+    const C: i32 = 42;
+}