Re: [PATCH] rust: introduce KVec::pop()

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

Hi Bernhard,

kernel test robot noticed the following build errors:

[auto build test ERROR on rust/rust-next]
[also build test ERROR on linus/master v6.13-rc1 next-20241128]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Bernhard-Kauer/rust-introduce-KVec-pop/20241202-170049
base:   https://github.com/Rust-for-Linux/linux rust-next
patch link:    https://lore.kernel.org/r/20241202085758.67319-1-bk%40alpico.io
patch subject: [PATCH] rust: introduce KVec::pop()
config: x86_64-buildonly-randconfig-001-20241203 (https://download.01.org/0day-ci/archive/20241203/202412031055.b3nviKAQ-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241203/202412031055.b3nviKAQ-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/202412031055.b3nviKAQ-lkp@intel.com/

All errors (new ones prefixed by >>):

>> error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
   --> rust/doctests_kernel_generated.rs:752:22
   |
   750 | fn main() { #[allow(non_snake_case)] fn _doctest_main__kbuild_src_consumer_rust_kernel_alloc_kvec_rs_309_0() {
   |                                      ----------------------------------------------------------------------- this function should return `Result` or `Option` to accept `?`
   751 | let mut v = KVec::new();
   752 | v.push(1, GFP_KERNEL)?;
   |                      ^ cannot use the `?` operator in a function that returns `()`
   |
   = help: the trait `FromResidual<core::result::Result<Infallible, rust_doctest_kernel_alloc_kbox_rs_4::kernel::alloc::AllocError>>` is not implemented for `()`
--
>> error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
   --> rust/doctests_kernel_generated.rs:753:22
   |
   750 | fn main() { #[allow(non_snake_case)] fn _doctest_main__kbuild_src_consumer_rust_kernel_alloc_kvec_rs_309_0() {
   |                                      ----------------------------------------------------------------------- this function should return `Result` or `Option` to accept `?`
   ...
   753 | v.push(2, GFP_KERNEL)?;
   |                      ^ cannot use the `?` operator in a function that returns `()`
   |
   = help: the trait `FromResidual<core::result::Result<Infallible, rust_doctest_kernel_alloc_kbox_rs_4::kernel::alloc::AllocError>>` is not implemented for `()`

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