src/test/ui/numbers-arithmetic/overflowing-sub.rs

   1 // run-fail
   2 // error-pattern:thread 'main' panicked at 'attempt to subtract with overflow'
   3 // ignore-emscripten no processes
   4 // compile-flags: -C debug-assertions
   5
   6 #![allow(arithmetic_overflow)]
   7
   8 fn main() {
   9     let _x = 42u8 - (42u8 + 1);
  10 }