rust: Fixes for 1.67.0

Signed-off-by: Hector Martin <marcan@marcan.st>

Author: marcan

rust/alloc/boxed.rs

@@ -1869,7 +1869,7 @@ impl<I: ExactSizeIterator + ?Sized, A: Allocator> ExactSizeIterator for Box<I, A
 impl<I: FusedIterator + ?Sized, A: Allocator> FusedIterator for Box<I, A> {}
 
 #[stable(feature = "boxed_closure_impls", since = "1.35.0")]
-impl<Args, F: FnOnce<Args> + ?Sized, A: Allocator> FnOnce<Args> for Box<F, A> {
+impl<Args: core::marker::Tuple, F: FnOnce<Args> + ?Sized, A: Allocator> FnOnce<Args> for Box<F, A> {
     type Output = <F as FnOnce<Args>>::Output;
 
     extern "rust-call" fn call_once(self, args: Args) -> Self::Output {
@@ -1878,14 +1878,14 @@ impl<Args, F: FnOnce<Args> + ?Sized, A: Allocator> FnOnce<Args> for Box<F, A> {
 }
 
 #[stable(feature = "boxed_closure_impls", since = "1.35.0")]
-impl<Args, F: FnMut<Args> + ?Sized, A: Allocator> FnMut<Args> for Box<F, A> {
+impl<Args: core::marker::Tuple, F: FnMut<Args> + ?Sized, A: Allocator> FnMut<Args> for Box<F, A> {
     extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output {
         <F as FnMut<Args>>::call_mut(self, args)
     }
 }
 
 #[stable(feature = "boxed_closure_impls", since = "1.35.0")]
-impl<Args, F: Fn<Args> + ?Sized, A: Allocator> Fn<Args> for Box<F, A> {
+impl<Args: core::marker::Tuple, F: Fn<Args> + ?Sized, A: Allocator> Fn<Args> for Box<F, A> {
     extern "rust-call" fn call(&self, args: Args) -> Self::Output {
         <F as Fn<Args>>::call(self, args)
     }

rust/alloc/lib.rs

@@ -141,6 +141,7 @@
 #![feature(trusted_len)]
 #![feature(trusted_random_access)]
 #![feature(try_trait_v2)]
+#![feature(tuple_trait)]
 #![feature(unchecked_math)]
 #![feature(unicode_internals)]
 #![feature(unsize)]