- // MIR for `call` before Inline
+ // MIR for `call` after Inline
  
  fn call(_1: Box<dyn FnMut<I, Output = ()>>, _2: I) -> () {
      debug mock => _1;
      debug input => _2;
      let mut _0: ();
      let mut _3: &mut std::boxed::Box<dyn std::ops::FnMut<I, Output = ()>>;
      let mut _4: I;
  
      bb0: {
          StorageLive(_3);
          _3 = &mut _1;
          StorageLive(_4);
          _4 = move _2;
          _0 = <Box<dyn FnMut<I, Output = ()>> as FnMut<I>>::call_mut(move _3, move _4) -> [return: bb1, unwind unreachable];
      }
  
      bb1: {
          StorageDead(_4);
          StorageDead(_3);
          drop(_1) -> [return: bb2, unwind unreachable];
      }
  
      bb2: {
          return;
      }
  }