1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs b/tests/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs
new file mode 100644
index 00000000000..79d78da3328
--- /dev/null
+++ b/tests/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs
@@ -0,0 +1,27 @@
+// run-pass
+// compile-flags: -C debug_assertions=yes
+// needs-unwind
+// ignore-emscripten dies with an LLVM error
+
+use std::panic;
+
+fn main() {
+    macro_rules! overflow_test {
+        ($t:ident) => (
+            let r = panic::catch_unwind(|| {
+                ($t::MAX).next_power_of_two()
+            });
+            assert!(r.is_err());
+
+            let r = panic::catch_unwind(|| {
+                (($t::MAX >> 1) + 2).next_power_of_two()
+            });
+            assert!(r.is_err());
+        )
+    }
+    overflow_test!(u8);
+    overflow_test!(u16);
+    overflow_test!(u32);
+    overflow_test!(u64);
+    overflow_test!(u128);
+}