1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/traits/issue-18400.rs b/tests/ui/traits/issue-18400.rs
new file mode 100644
index 00000000000..fdd11512da3
--- /dev/null
+++ b/tests/ui/traits/issue-18400.rs
@@ -0,0 +1,26 @@
+trait Set<T> {
+    fn contains(&self, _: T) -> bool;
+    fn set(&mut self, _: T);
+}
+
+impl<'a, T, S> Set<&'a [T]> for S where
+    T: Copy,
+    S: Set<T>,
+{
+    fn contains(&self, bits: &[T]) -> bool {
+        bits.iter().all(|&bit| self.contains(bit))
+    }
+
+    fn set(&mut self, bits: &[T]) {
+        for &bit in bits {
+            self.set(bit)
+        }
+    }
+}
+
+fn main() {
+    let bits: &[_] = &[0, 1];
+
+    0.contains(bits);
+    //~^ ERROR overflow
+}