1 files changed, 17 insertions, 0 deletions
diff --git a/tests/ui/inference/inference_unstable_featured.rs b/tests/ui/inference/inference_unstable_featured.rs
new file mode 100644
index 000000000..792b29aaa
--- /dev/null
+++ b/tests/ui/inference/inference_unstable_featured.rs
@@ -0,0 +1,17 @@
+// There should be E0034 "multiple applicable items in scope" if we opt-in for
+// the feature.
+
+// aux-build:inference_unstable_iterator.rs
+// aux-build:inference_unstable_itertools.rs
+
+#![feature(ipu_flatten)]
+
+extern crate inference_unstable_iterator;
+extern crate inference_unstable_itertools;
+
+use inference_unstable_iterator::IpuIterator;
+use inference_unstable_itertools::IpuItertools;
+
+fn main() {
+    assert_eq!('x'.ipu_flatten(), 0);   //~ ERROR E0034
+}