1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/consts/const-err.rs b/src/test/ui/consts/const-err.rs
new file mode 100644
index 000000000..a8633fd87
--- /dev/null
+++ b/src/test/ui/consts/const-err.rs
@@ -0,0 +1,19 @@
+// build-fail
+// compile-flags: -C overflow-checks=on
+
+#![allow(arithmetic_overflow)]
+#![warn(const_err)]
+
+fn black_box<T>(_: T) {
+    unimplemented!()
+}
+
+const FOO: u8 = [5u8][1];
+//~^ WARN any use of this value will cause an error
+//~| WARN this was previously accepted by the compiler but is being phased out
+
+fn main() {
+    black_box((FOO, FOO));
+    //~^ ERROR erroneous constant used
+    //~| ERROR erroneous constant
+}