1 files changed, 4 insertions, 0 deletions
diff --git a/tests/ui/index-help.rs b/tests/ui/index-help.rs
new file mode 100644
index 00000000000..66571ec41a0
--- /dev/null
+++ b/tests/ui/index-help.rs
@@ -0,0 +1,4 @@
+fn main() {
+    let x = vec![1];
+    x[0i32]; //~ ERROR E0277
+}