Merge #310

310: rm MSRV r=japaric a=japaric



Co-authored-by: Jorge Aparicio <jorge.aparicio@ferrous-systems.com>

Author: bors[bot]

.github/workflows/build.yml

@@ -157,7 +157,6 @@ jobs:
         toolchain:
           - stable
           - nightly
-          - 1.51.0
         features:
           - serde
         buildtype:
@@ -294,7 +293,7 @@ jobs:
       - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.51.0
+          toolchain: stable
           target: x86_64-unknown-linux-gnu
           override: true
 

CHANGELOG.md

@@ -13,6 +13,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Fixed
 
+### Removed
+
+- [breaking-change] this crate no longer has a Minimum Supported Rust Version (MSRV) guarantee and
+  should be used with the latest stable version of the Rust toolchain.
+
 ## [v0.7.16] - 2022-08-09
 
 ### Added

cfail/ui/freeze.stderr

@@ -1,9 +1,9 @@
 error[E0499]: cannot borrow `q` as mutable more than once at a time
- --> $DIR/freeze.rs:7:5
+ --> ui/freeze.rs:7:5
   |
 6 |     let (_p, mut _c) = q.split();
-  |                        - first mutable borrow occurs here
+  |                        --------- first mutable borrow occurs here
 7 |     q.enqueue(0).unwrap();
-  |     ^ second mutable borrow occurs here
+  |     ^^^^^^^^^^^^ second mutable borrow occurs here
 8 |     _c.dequeue();
-  |     -- first borrow later used here
+  |     ------------ first borrow later used here

cfail/ui/not-send.stderr

@@ -1,44 +1,42 @@
 error[E0277]: `*const ()` cannot be sent between threads safely
-  --> $DIR/not-send.rs:19:5
+  --> ui/not-send.rs:19:5
    |
-12 | fn is_send<T>()
-   |    ------- required by a bound in this
-13 | where
-14 |     T: Send,
-   |        ---- required by this bound in `is_send`
-...
 19 |     is_send::<Consumer<NotSend, 4>>();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
    |
    = help: within `PhantomData<*const ()>`, the trait `Send` is not implemented for `*const ()`
    = note: required because it appears within the type `PhantomData<*const ()>`
    = note: required because of the requirements on the impl of `Send` for `Consumer<'_, PhantomData<*const ()>, 4_usize>`
-
-error[E0277]: `*const ()` cannot be sent between threads safely
-  --> $DIR/not-send.rs:20:5
+note: required by a bound in `is_send`
+  --> ui/not-send.rs:14:8
    |
 12 | fn is_send<T>()
    |    ------- required by a bound in this
 13 | where
 14 |     T: Send,
-   |        ---- required by this bound in `is_send`
-...
+   |        ^^^^ required by this bound in `is_send`
+
+error[E0277]: `*const ()` cannot be sent between threads safely
+  --> ui/not-send.rs:20:5
+   |
 20 |     is_send::<Producer<NotSend, 4>>();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
    |
    = help: within `PhantomData<*const ()>`, the trait `Send` is not implemented for `*const ()`
    = note: required because it appears within the type `PhantomData<*const ()>`
    = note: required because of the requirements on the impl of `Send` for `Producer<'_, PhantomData<*const ()>, 4_usize>`
-
-error[E0277]: `*const ()` cannot be sent between threads safely
-  --> $DIR/not-send.rs:21:5
+note: required by a bound in `is_send`
+  --> ui/not-send.rs:14:8
    |
 12 | fn is_send<T>()
    |    ------- required by a bound in this
 13 | where
 14 |     T: Send,
-   |        ---- required by this bound in `is_send`
-...
+   |        ^^^^ required by this bound in `is_send`
+
+error[E0277]: `*const ()` cannot be sent between threads safely
+  --> ui/not-send.rs:21:5
+   |
 21 |     is_send::<Queue<NotSend, 4>>();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
    |
@@ -49,16 +47,18 @@ error[E0277]: `*const ()` cannot be sent between threads safely
    = note: required because it appears within the type `UnsafeCell<MaybeUninit<PhantomData<*const ()>>>`
    = note: required because it appears within the type `[UnsafeCell<MaybeUninit<PhantomData<*const ()>>>; 4]`
    = note: required because it appears within the type `Queue<PhantomData<*const ()>, 4_usize>`
-
-error[E0277]: `*const ()` cannot be sent between threads safely
-  --> $DIR/not-send.rs:22:5
+note: required by a bound in `is_send`
+  --> ui/not-send.rs:14:8
    |
 12 | fn is_send<T>()
    |    ------- required by a bound in this
 13 | where
 14 |     T: Send,
-   |        ---- required by this bound in `is_send`
-...
+   |        ^^^^ required by this bound in `is_send`
+
+error[E0277]: `*const ()` cannot be sent between threads safely
+  --> ui/not-send.rs:22:5
+   |
 22 |     is_send::<Vec<NotSend, 4>>();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
    |
@@ -68,16 +68,18 @@ error[E0277]: `*const ()` cannot be sent between threads safely
    = note: required because it appears within the type `MaybeUninit<PhantomData<*const ()>>`
    = note: required because it appears within the type `[MaybeUninit<PhantomData<*const ()>>; 4]`
    = note: required because it appears within the type `heapless::Vec<PhantomData<*const ()>, 4_usize>`
-
-error[E0277]: `*const ()` cannot be sent between threads safely
-  --> $DIR/not-send.rs:23:5
+note: required by a bound in `is_send`
+  --> ui/not-send.rs:14:8
    |
 12 | fn is_send<T>()
    |    ------- required by a bound in this
 13 | where
 14 |     T: Send,
-   |        ---- required by this bound in `is_send`
-...
+   |        ^^^^ required by this bound in `is_send`
+
+error[E0277]: `*const ()` cannot be sent between threads safely
+  --> ui/not-send.rs:23:5
+   |
 23 |     is_send::<HistoryBuffer<NotSend, 4>>();
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `*const ()` cannot be sent between threads safely
    |
@@ -87,3 +89,11 @@ error[E0277]: `*const ()` cannot be sent between threads safely
    = note: required because it appears within the type `MaybeUninit<PhantomData<*const ()>>`
    = note: required because it appears within the type `[MaybeUninit<PhantomData<*const ()>>; 4]`
    = note: required because it appears within the type `HistoryBuffer<PhantomData<*const ()>, 4_usize>`
+note: required by a bound in `is_send`
+  --> ui/not-send.rs:14:8
+   |
+12 | fn is_send<T>()
+   |    ------- required by a bound in this
+13 | where
+14 |     T: Send,
+   |        ^^^^ required by this bound in `is_send`

src/lib.rs

@@ -64,8 +64,11 @@
 //!
 //! # Minimum Supported Rust Version (MSRV)
 //!
-//! This crate is guaranteed to compile on stable Rust 1.51 and up with its default set of features.
-//! It *might* compile on older versions but that may change in any new patch release.
+//! This crate does *not* have a Minimum Supported Rust Version (MSRV) and may make use of language
+//! features and API in the standard library available in the latest stable Rust version.
+//!
+//! In other words, changes in the Rust version requirement of this crate are not considered semver
+//! breaking change and may occur in patch version releases.
 
 #![cfg_attr(not(test), no_std)]
 #![deny(missing_docs)]