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-rw-r--r--tests/ui/consts/const-err2.rs39
1 files changed, 39 insertions, 0 deletions
diff --git a/tests/ui/consts/const-err2.rs b/tests/ui/consts/const-err2.rs
new file mode 100644
index 000000000..db49ec25a
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+++ b/tests/ui/consts/const-err2.rs
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+// needed because negating int::MIN will behave differently between
+// optimized compilation and unoptimized compilation and thus would
+// lead to different lints being emitted
+
+// revisions: noopt opt opt_with_overflow_checks
+//[noopt]compile-flags: -C opt-level=0
+//[opt]compile-flags: -O
+//[opt_with_overflow_checks]compile-flags: -C overflow-checks=on -O
+
+// build-fail
+
+#![feature(rustc_attrs)]
+
+fn black_box<T>(_: T) {
+ unimplemented!()
+}
+
+fn main() {
+ let a = -i8::MIN;
+ //~^ ERROR arithmetic operation will overflow
+ let a_i128 = -i128::MIN;
+ //~^ ERROR arithmetic operation will overflow
+ let b = 200u8 + 200u8 + 200u8;
+ //~^ ERROR arithmetic operation will overflow
+ let b_i128 = i128::MIN - i128::MAX;
+ //~^ ERROR arithmetic operation will overflow
+ let c = 200u8 * 4;
+ //~^ ERROR arithmetic operation will overflow
+ let d = 42u8 - (42u8 + 1);
+ //~^ ERROR arithmetic operation will overflow
+ let _e = [5u8][1];
+ //~^ ERROR operation will panic
+ black_box(a);
+ black_box(a_i128);
+ black_box(b);
+ black_box(b_i128);
+ black_box(c);
+ black_box(d);
+}