[tiwai-sound:test/sound-rust-v7.3 2/56] error[E0599]: the associated function or constant `new_zeroed_slice` exists for struct `rust_doctest_kernel_alloc_allocator_rs_0::kernel::alloc::Box<[u8], Kmalloc>`, but its trait bounds were not satisfied

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git test/sound-rust-v7.3
head:   070444a8abf14da700680a5331d0a95cd11e578b
commit: 9985fb1d439627f74610170aeabe7b590f6b5145 [2/56] rust: alloc: add Box::new_zeroed_slice()
config: x86_64-randconfig-2302-20261105 (https://download.01.org/0day-ci/archive/20261106/202611060812.fRcN8aWV-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
rustc: rustc 1.96.0 (ac68faa20 2026-05-25)
sparse: v0.6.5-rc1-21-g84ec0658
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261106/202611060812.fRcN8aWV-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202611060812.fRcN8aWV-lkp@intel.com/

All errors (new ones prefixed by >>):

>> error[E0599]: the associated function or constant `new_zeroed_slice` exists for struct `rust_doctest_kernel_alloc_allocator_rs_0::kernel::alloc::Box<[u8], Kmalloc>`, but its trait bounds were not satisfied
   --> rust/doctests_kernel_generated.rs:469:23
   |
   469 | let b = KBox::<[u8]>::new_zeroed_slice(10, GFP_KERNEL)?;
   |                       ^^^^^^^^^^^^^^^^ associated function or constant cannot be called due to unsatisfied trait bounds
   |
   note: if you're trying to build a new `rust_doctest_kernel_alloc_allocator_rs_0::kernel::alloc::Box<[u8], Kmalloc>`, consider using `rust_doctest_kernel_alloc_allocator_rs_0::kernel::alloc::Box::<T, A>::from_raw` which returns `rust_doctest_kernel_alloc_allocator_rs_0::kernel::alloc::Box<_, _>`
   --> rust/kernel/alloc/kbox.rs:177:5
   |
   177 |     pub const unsafe fn from_raw(raw: *mut T) -> Self {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: the following trait bounds were not satisfied:
   `[u8]: Sized`

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