1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/iterators/iter-count-overflow-debug.rs b/src/test/ui/iterators/iter-count-overflow-debug.rs
new file mode 100644
index 000000000..15f25f1ca
--- /dev/null
+++ b/src/test/ui/iterators/iter-count-overflow-debug.rs
@@ -0,0 +1,16 @@
+// run-pass
+// only-32bit too impatient for 2⁶⁴ items
+// needs-unwind
+// ignore-wasm32-bare compiled with panic=abort by default
+// compile-flags: -C debug_assertions=yes -C opt-level=3
+
+use std::panic;
+
+fn main() {
+    assert_eq!((0..usize::MAX).by_ref().count(), usize::MAX);
+
+    let r = panic::catch_unwind(|| {
+        (0..=usize::MAX).by_ref().count()
+    });
+    assert!(r.is_err());
+}