tokio: raise MSRV to 1.71 (#7658)

tokio/Cargo.toml

@@ -8,7 +8,7 @@ name = "tokio"
 # - Create "v1.x.y" git tag.
 version = "1.47.1"
 edition = "2021"
-rust-version = "1.70"
+rust-version = "1.71"
 authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 readme = "README.md"

tokio/README.md

@@ -186,12 +186,13 @@ When updating this, also update:
 
 Tokio will keep a rolling MSRV (minimum supported rust version) policy of **at
 least** 6 months. When increasing the MSRV, the new Rust version must have been
-released at least six months ago. The current MSRV is 1.70.
+released at least six months ago. The current MSRV is 1.71.
 
 Note that the MSRV is not increased automatically, and only as part of a minor
 release. The MSRV history for past minor releases can be found below:
 
- * 1.39 to now  - Rust 1.70
+ * 1.48 to now  - Rust 1.71
+ * 1.39 to 1.47 - Rust 1.70
  * 1.30 to 1.38 - Rust 1.63
  * 1.27 to 1.29 - Rust 1.56
  * 1.17 to 1.26 - Rust 1.49

tokio/src/loom/std/mod.rs

@@ -39,14 +39,8 @@ pub(crate) mod rand {
 
     pub(crate) fn seed() -> u64 {
         let rand_state = RandomState::new();
-
-        let mut hasher = rand_state.build_hasher();
-
         // Hash some unique-ish data to generate some new state
-        COUNTER.fetch_add(1, Relaxed).hash(&mut hasher);
-
-        // Get the seed
-        hasher.finish()
+        rand_state.hash_one(COUNTER.fetch_add(1, Relaxed))
     }
 }