Fix compilation errors

Author: qinheping

library/core/src/alloc/layout.rs

@@ -13,6 +13,8 @@ use crate::{assert_unsafe_precondition, fmt, mem};
 
 #[cfg(kani)]
 use crate::kani;
+#[cfg(kani)]
+use crate::cmp;
 
 // Used only for contract verification.
 #[allow(unused_imports)]

library/core/src/num/mod.rs

@@ -1682,7 +1682,6 @@ from_str_radix_size_impl! { signed i16 isize, unsigned u16 usize }
 #[cfg(target_pointer_width = "32")]
 from_str_radix_size_impl! { signed i32 isize, unsigned u32 usize }
 #[cfg(target_pointer_width = "64")]
-from_str_radix_size_impl! { i64 isize, u64 usize }
 from_str_radix_size_impl! { signed i64 isize, unsigned u64 usize }
 
 #[cfg(kani)]

library/core/src/ptr/unique.rs

@@ -100,7 +100,7 @@ impl<T: ?Sized> Unique<T> {
     #[inline]
     #[rustc_const_unstable(feature = "const_align_offset", issue = "90962")]
     #[ensures(|result| result.is_none() == ptr.is_null())]
-    #[ensures(|result| result.is_none() || result.unwrap().as_ptr() == ptr)]x
+    #[ensures(|result| result.is_none() || result.unwrap().as_ptr() == ptr)]
     pub const fn new(ptr: *mut T) -> Option<Self> {
         if let Some(pointer) = NonNull::new(ptr) {
             Some(Unique { pointer, _marker: PhantomData })