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-rw-r--r--src/test/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs b/src/test/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs
new file mode 100644
index 000000000..f857d4f4c
--- /dev/null
+++ b/src/test/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs
@@ -0,0 +1,28 @@
+// run-pass
+// compile-flags: -C debug_assertions=yes
+// needs-unwind
+// ignore-wasm32-bare compiled with panic=abort by default
+// 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);
+}