1 files changed, 13 insertions, 0 deletions
diff --git a/src/test/ui/feature-gates/feature-gate-is_sorted.rs b/src/test/ui/feature-gates/feature-gate-is_sorted.rs
new file mode 100644
index 000000000..359ed835b
--- /dev/null
+++ b/src/test/ui/feature-gates/feature-gate-is_sorted.rs
@@ -0,0 +1,13 @@
+fn main() {
+    // Assert `Iterator` methods are unstable
+    assert!([1, 2, 2, 9].iter().is_sorted());
+    //~^ ERROR: use of unstable library feature 'is_sorted': new API
+    assert!(![-2i32, -1, 0, 3].iter().is_sorted_by_key(|n| n.abs()));
+    //~^ ERROR: use of unstable library feature 'is_sorted': new API
+
+    // Assert `[T]` methods are unstable
+    assert!([1, 2, 2, 9].is_sorted());
+    //~^ ERROR: use of unstable library feature 'is_sorted': new API
+    assert!(![-2i32, -1, 0, 3].is_sorted_by_key(|n| n.abs()));
+    //~^ ERROR: use of unstable library feature 'is_sorted': new API
+}