Auto merge of #96689 - gimbles:campfire, r=Mark-Simulacrum

[rust.git] / RELEASES.md

diff --git a/RELEASES.md b/RELEASES.md
index 6f1cf2ee11c57106cdbbdbeb7e57a76e8fc4c20b..0965e37574d074fda69042077ab01df5166b891a 100644 (file)
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -27,8 +27,9 @@ Libraries
 ---------
 - [Guarantee call order for `sort_by_cached_key`][89621]
 - [Improve `Duration::try_from_secs_f32`/`f64` accuracy by directly processing exponent and mantissa][90247]
-- [Make `Instant::{duration_since, elapsed, sub}` saturating and remove workarounds][89926]
-- [Change PhantomData type for `BuildHasherDefault` (and more)][92630]
+- [Make `Instant::{duration_since, elapsed, sub}` saturating][89926]
+- [Remove non-monotonic clocks workarounds in `Instant::now`][89926]
+- [Make `BuildHasherDefault`, `iter::Empty` and `future::Pending` covariant][92630]
 
 Stabilized APIs
 ---------------
@@ -68,13 +69,24 @@ Cargo
 
 Misc
 ----
-- [Add manifest docs fallback for tier-2 platforms.][92800]
+- [Ship docs on Tier 2 platforms by reusing the closest Tier 1 platform docs][92800]
 - [Drop rustc-docs from complete profile][93742]
 - [bootstrap: tidy up flag handling for llvm build][93918]
 
 Compatibility Notes
 -------------------
 - [Remove compiler-rt linking hack on Android][83822]
+- [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.
+- In a future release we're planning to increase the baseline requirements for
+  the Linux kernel to version 3.2, and for glibc to version 2.17. We'd love
+  your feedback in [PR #95026][95026].
 
 Internal Changes
 ----------------
@@ -107,6 +119,7 @@ and related tools.
 [93742]: https://github.com/rust-lang/rust/pull/93742
 [93824]: https://github.com/rust-lang/rust/pull/93824
 [93918]: https://github.com/rust-lang/rust/pull/93918
+[95026]: https://github.com/rust-lang/rust/pull/95026
 
 [cargo/10086]: https://github.com/rust-lang/cargo/pull/10086
 [cargo/10245]: https://github.com/rust-lang/cargo/pull/10245