message: Fix Operator::Br.
diff: @@ -1276,11 +1276,11 @@ impl FunctionCodeGenerator for X64FunctionCode {
  } else {
  false
  };
  - let released: Vec<Location> = self.value_stack.drain(frame.value_stack_depth..)
  - .filter(|&(_, lot)| lot == LocalOrTemp::Temp)
  - .map(|(x, _)| x)
  + let released: Vec<Location> = self.value_stack[frame.value_stack_depth..].iter()
  + .filter(|&&(_, lot)| lot == LocalOrTemp::Temp)
  + .map(|&(x, _)| x)
  .collect();
  - self.machine.release_locations(a, &released);
  + self.machine.release_locations_keep_state(a, &released);
  a.emit_jmp(Condition::None, frame.label);
  self.unreachable_depth = 1;
  }
  