src/test/ui/consts/const-eval/promoted_errors.rs

   1 // revisions: noopt opt opt_with_overflow_checks
   2 //[noopt]compile-flags: -C opt-level=0
   3 //[opt]compile-flags: -O
   4 //[opt_with_overflow_checks]compile-flags: -C overflow-checks=on -O
   5
   6 // build-pass
   7 // ignore-pass (emit codegen-time warnings and verify that they are indeed warnings and not errors)
   8
   9 #![warn(const_err, arithmetic_overflow, unconditional_panic)]
  10
  11 fn main() {
  12     println!("{}", 0u32 - 1);
  13     //[opt_with_overflow_checks,noopt]~^ WARN [arithmetic_overflow]
  14     let _x = 0u32 - 1;
  15     //~^ WARN [arithmetic_overflow]
  16     println!("{}", 1 / (1 - 1));
  17     //~^ WARN [unconditional_panic]
  18     //~| WARN panic or abort [const_err]
  19     //~| WARN erroneous constant used [const_err]
  20     let _x = 1 / (1 - 1);
  21     //~^ WARN [unconditional_panic]
  22     println!("{}", 1 / (false as u32));
  23     //~^ WARN [unconditional_panic]
  24     //~| WARN panic or abort [const_err]
  25     //~| WARN erroneous constant used [const_err]
  26     let _x = 1 / (false as u32);
  27     //~^ WARN [unconditional_panic]
  28 }