if *locked_idx == this.lock_idx {
// Note that with `feature = "backtrace"` set, we may be looking at different
// instances of the same lock. Still, doing so is quite risky, a total order
if *locked_idx == this.lock_idx {
// Note that with `feature = "backtrace"` set, we may be looking at different
// instances of the same lock. Still, doing so is quite risky, a total order