+- [Mitigations for platforms with non-monotonic clocks have been removed from
+ `Instant::now`][89926]. On platforms that don't provide monotonic clocks, an
+ instant is not guaranteed to be greater than an earlier instant anymore.
+- [`Instant::{duration_since, elapsed, sub}` do not panic anymore on underflow,
+ saturating to `0` instead][89926]. In the real world the panic happened mostly
+ on platforms with buggy monotonic clock implementations rather than catching
+ programming errors like reversing the start and end times. Such programming
+ errors will now results in `0` rather than a panic.