- // MIR for `main` before ConstProp
+ // MIR for `main` after ConstProp
  
  fn main() -> () {
      let mut _0: ();                      // return place in scope 0 at $DIR/const_prop_fails_gracefully.rs:+0:11: +0:11
      let _1: usize;                       // in scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:9: +2:10
      let mut _2: *const i32;              // in scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:13: +2:30
      let _3: &i32;                        // in scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:13: +2:16
      let _4: ();                          // in scope 0 at $DIR/const_prop_fails_gracefully.rs:+3:5: +3:12
      let mut _5: usize;                   // in scope 0 at $DIR/const_prop_fails_gracefully.rs:+3:10: +3:11
      scope 1 {
          debug x => _1;                   // in scope 1 at $DIR/const_prop_fails_gracefully.rs:+2:9: +2:10
      }
  
      bb0: {
          StorageLive(_1);                 // scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:9: +2:10
          StorageLive(_2);                 // scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:13: +2:30
          StorageLive(_3);                 // scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:13: +2:16
          _3 = const FOO;                  // scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:13: +2:16
                                           // mir::Constant
                                           // + span: $DIR/const_prop_fails_gracefully.rs:7:13: 7:16
                                           // + literal: Const { ty: &i32, val: Unevaluated(FOO, [], None) }
          _2 = &raw const (*_3);           // scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:13: +2:16
          _1 = move _2 as usize (PointerExposeAddress); // scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:13: +2:39
          StorageDead(_2);                 // scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:38: +2:39
          StorageDead(_3);                 // scope 0 at $DIR/const_prop_fails_gracefully.rs:+2:39: +2:40
          StorageLive(_4);                 // scope 1 at $DIR/const_prop_fails_gracefully.rs:+3:5: +3:12
          StorageLive(_5);                 // scope 1 at $DIR/const_prop_fails_gracefully.rs:+3:10: +3:11
          _5 = _1;                         // scope 1 at $DIR/const_prop_fails_gracefully.rs:+3:10: +3:11
          _4 = read(move _5) -> bb1;       // scope 1 at $DIR/const_prop_fails_gracefully.rs:+3:5: +3:12
                                           // mir::Constant
                                           // + span: $DIR/const_prop_fails_gracefully.rs:8:5: 8:9
                                           // + literal: Const { ty: fn(usize) {read}, val: Value(<ZST>) }
      }
  
      bb1: {
          StorageDead(_5);                 // scope 1 at $DIR/const_prop_fails_gracefully.rs:+3:11: +3:12
          StorageDead(_4);                 // scope 1 at $DIR/const_prop_fails_gracefully.rs:+3:12: +3:13
          nop;                             // scope 0 at $DIR/const_prop_fails_gracefully.rs:+0:11: +4:2
          StorageDead(_1);                 // scope 0 at $DIR/const_prop_fails_gracefully.rs:+4:1: +4:2
          return;                          // scope 0 at $DIR/const_prop_fails_gracefully.rs:+4:2: +4:2
      }
  }