[rust:pr/1130 2/3] error[E0405]: cannot find trait `Unsize` in this scope

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

tree:   https://github.com/Rust-for-Linux/linux pr/1130
head:   22607a75f562e7ffa92b8b44ac1574bcb214134d
commit: 36e9396cf5591aa42b19eacba22ee3f7e96bf792 [2/3] gating behind version 1.83.0
config: um-randconfig-001-20241123 (https://download.01.org/0day-ci/archive/20241123/202411230517.g7Dbe7Ge-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 592c0fe55f6d9a811028b5f3507be91458ab2713)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241123/202411230517.g7Dbe7Ge-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/202411230517.g7Dbe7Ge-lkp@intel.com/

Note: the rust/pr/1130 HEAD 22607a75f562e7ffa92b8b44ac1574bcb214134d builds fine.
      It only hurts bisectability.

All errors (new ones prefixed by >>):

>> error[E0405]: cannot find trait `Unsize` in this scope
   --> rust/kernel/list/arc.rs:450:26
   |
   450 |     T: ListArcSafe<ID> + Unsize<U> + ?Sized,
   |                          ^^^^^^ not found in this scope
   |
   help: consider importing this trait
   |
   7   + use core::marker::Unsize;
   |
--
>> error[E0405]: cannot find trait `Unsize` in this scope
   --> rust/kernel/list/arc.rs:460:26
   |
   460 |     T: ListArcSafe<ID> + Unsize<U> + ?Sized,
   |                          ^^^^^^ not found in this scope
   |
   help: consider importing this trait
   |
   7   + use core::marker::Unsize;
   |

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