Rollup merge of #67480 - rossmacarthur:fix-41260-avoid-issue-0-part-2, r=Centril

Require issue = "none" over issue = "0" in unstable attributes

These changes make the use of `issue = "none"` required in unstable attributes throughout the compiler.

Notes:
- #66299 is now in beta so `issue = "none"` is accepted.
- The `tidy` tool now fails on `issue = "0"`.
- Tests that used `issue = "0"` were changed to use `issue = "none"`, except for _one_ that asserts `issue = "0"` can still be used.
- The compiler still allows `issue = "0"` because some submodules require it, this could be disallowed once these are updated.

Resolves #41260

r? @varkor

7 files changed, 16 insertions, 16 deletions

diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 1c39a3721f4..3e4005acaf3 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -476,7 +476,7 @@ impl<T: ?Sized> Box<T> {
         Box::into_unique(b).into()
     }
 
-    #[unstable(feature = "ptr_internals", issue = "0", reason = "use into_raw_non_null instead")]
+    #[unstable(feature = "ptr_internals", issue = "none", reason = "use into_raw_non_null instead")]
     #[inline]
     #[doc(hidden)]
     pub fn into_unique(b: Box<T>) -> Unique<T> {
@@ -830,7 +830,7 @@ impl From<Box<str>> for Box<[u8]> {
     }
 }
 
-#[unstable(feature = "boxed_slice_try_from", issue = "0")]
+#[unstable(feature = "boxed_slice_try_from", issue = "none")]
 impl<T, const N: usize> TryFrom<Box<[T]>> for Box<[T; N]>
 where
     [T; N]: LengthAtMost32,
@@ -946,7 +946,7 @@ impl<T: ?Sized> DerefMut for Box<T> {
     }
 }
 
-#[unstable(feature = "receiver_trait", issue = "0")]
+#[unstable(feature = "receiver_trait", issue = "none")]
 impl<T: ?Sized> Receiver for Box<T> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1040,7 +1040,7 @@ impl<A, F: Fn<A> + ?Sized> Fn<A> for Box<F> {
 #[unstable(feature = "coerce_unsized", issue = "27732")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Box<U>> for Box<T> {}
 
-#[unstable(feature = "dispatch_from_dyn", issue = "0")]
+#[unstable(feature = "dispatch_from_dyn", issue = "none")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Box<U>> for Box<T> {}
 
 #[stable(feature = "boxed_slice_from_iter", since = "1.32.0")]
diff --git a/src/liballoc/collections/mod.rs b/src/liballoc/collections/mod.rs
index f1f22fe48c5..390a48180c0 100644
--- a/src/liballoc/collections/mod.rs
+++ b/src/liballoc/collections/mod.rs
@@ -57,7 +57,7 @@ pub enum TryReserveError {
         layout: Layout,
 
         #[doc(hidden)]
-        #[unstable(feature = "container_error_extra", issue = "0", reason = "\
+        #[unstable(feature = "container_error_extra", issue = "none", reason = "\
             Enable exposing the allocator’s custom error value \
             if an associated type is added in the future: \
             https://github.com/rust-lang/wg-allocators/issues/23")]
diff --git a/src/liballoc/fmt.rs b/src/liballoc/fmt.rs
index 18ebae33309..01d4913665c 100644
--- a/src/liballoc/fmt.rs
+++ b/src/liballoc/fmt.rs
@@ -514,7 +514,7 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-#[unstable(feature = "fmt_internals", issue = "0")]
+#[unstable(feature = "fmt_internals", issue = "none")]
 pub use core::fmt::rt;
 #[stable(feature = "fmt_flags_align", since = "1.28.0")]
 pub use core::fmt::Alignment;
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
index be46e632be4..b549fa1ef4f 100644
--- a/src/liballoc/lib.rs
+++ b/src/liballoc/lib.rs
@@ -171,7 +171,7 @@ mod std {
 }
 
 #[doc(hidden)]
-#[unstable(feature = "liballoc_internals", issue = "0", reason = "implementation detail")]
+#[unstable(feature = "liballoc_internals", issue = "none", reason = "implementation detail")]
 pub mod __export {
     pub use core::format_args;
 }
diff --git a/src/liballoc/raw_vec.rs b/src/liballoc/raw_vec.rs
index 3201c702abb..444450f6628 100644
--- a/src/liballoc/raw_vec.rs
+++ b/src/liballoc/raw_vec.rs
@@ -1,4 +1,4 @@
-#![unstable(feature = "raw_vec_internals", reason = "implementation detail", issue = "0")]
+#![unstable(feature = "raw_vec_internals", reason = "implementation detail", issue = "none")]
 #![doc(hidden)]
 
 use core::cmp;
diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index 42a278de98b..9046403e907 100644
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -291,7 +291,7 @@ impl<T: ?Sized> !marker::Sync for Rc<T> {}
 #[unstable(feature = "coerce_unsized", issue = "27732")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Rc<U>> for Rc<T> {}
 
-#[unstable(feature = "dispatch_from_dyn", issue = "0")]
+#[unstable(feature = "dispatch_from_dyn", issue = "none")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Rc<U>> for Rc<T> {}
 
 impl<T: ?Sized> Rc<T> {
@@ -1090,7 +1090,7 @@ impl<T: ?Sized> Deref for Rc<T> {
     }
 }
 
-#[unstable(feature = "receiver_trait", issue = "0")]
+#[unstable(feature = "receiver_trait", issue = "none")]
 impl<T: ?Sized> Receiver for Rc<T> {}
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1471,7 +1471,7 @@ impl<T> From<Vec<T>> for Rc<[T]> {
     }
 }
 
-#[unstable(feature = "boxed_slice_try_from", issue = "0")]
+#[unstable(feature = "boxed_slice_try_from", issue = "none")]
 impl<T, const N: usize> TryFrom<Rc<[T]>> for Rc<[T; N]>
 where
     [T; N]: LengthAtMost32,
@@ -1621,7 +1621,7 @@ impl<T: ?Sized> !marker::Sync for Weak<T> {}
 #[unstable(feature = "coerce_unsized", issue = "27732")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Weak<U>> for Weak<T> {}
 
-#[unstable(feature = "dispatch_from_dyn", issue = "0")]
+#[unstable(feature = "dispatch_from_dyn", issue = "none")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Weak<U>> for Weak<T> {}
 
 impl<T> Weak<T> {
diff --git a/src/liballoc/sync.rs b/src/liballoc/sync.rs
index a99564c0dac..88027d48e8a 100644
--- a/src/liballoc/sync.rs
+++ b/src/liballoc/sync.rs
@@ -206,7 +206,7 @@ unsafe impl<T: ?Sized + Sync + Send> Sync for Arc<T> {}
 #[unstable(feature = "coerce_unsized", issue = "27732")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Arc<U>> for Arc<T> {}
 
-#[unstable(feature = "dispatch_from_dyn", issue = "0")]
+#[unstable(feature = "dispatch_from_dyn", issue = "none")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Arc<U>> for Arc<T> {}
 
 impl<T: ?Sized> Arc<T> {
@@ -263,7 +263,7 @@ unsafe impl<T: ?Sized + Sync + Send> Sync for Weak<T> {}
 
 #[unstable(feature = "coerce_unsized", issue = "27732")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Weak<U>> for Weak<T> {}
-#[unstable(feature = "dispatch_from_dyn", issue = "0")]
+#[unstable(feature = "dispatch_from_dyn", issue = "none")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Weak<U>> for Weak<T> {}
 
 #[stable(feature = "arc_weak", since = "1.4.0")]
@@ -993,7 +993,7 @@ impl<T: ?Sized> Deref for Arc<T> {
     }
 }
 
-#[unstable(feature = "receiver_trait", issue = "0")]
+#[unstable(feature = "receiver_trait", issue = "none")]
 impl<T: ?Sized> Receiver for Arc<T> {}
 
 impl<T: Clone> Arc<T> {
@@ -2032,7 +2032,7 @@ impl<T> From<Vec<T>> for Arc<[T]> {
     }
 }
 
-#[unstable(feature = "boxed_slice_try_from", issue = "0")]
+#[unstable(feature = "boxed_slice_try_from", issue = "none")]
 impl<T, const N: usize> TryFrom<Arc<[T]>> for Arc<[T; N]>
 where
     [T; N]: LengthAtMost32,