Re: [PATCH] rust: replace length checks with match

On Wed, May 28, 2025 at 11:58 AM kernel test robot lkp@intel.com wrote:

Hi Tamir,

kernel test robot noticed the following build errors:

[auto build test ERROR on bfc3cd87559bc593bb32bb1482f9cae3308b6398]

url: https://github.com/intel-lab-lkp/linux/commits/Tamir-Duberstein/rust-replace... base: bfc3cd87559bc593bb32bb1482f9cae3308b6398 patch link: https://lore.kernel.org/r/20250527-idiomatic-match-slice-v1-1-34b0b1d1d58c%4... patch subject: [PATCH] rust: replace length checks with match config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250528/202505282330.oOHtt60s-lkp@i...) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) rustc: rustc 1.78.0 (9b00956e5 2024-04-29) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250528/202505282330.oOHtt60s-lkp@i...)

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/202505282330.oOHtt60s-lkp@intel.com/

All errors (new ones prefixed by >>):

PATH=/opt/cross/clang-18/bin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin INFO PATH=/opt/cross/rustc-1.78.0-bindgen-0.65.1/cargo/bin:/opt/cross/clang-18/bin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin /usr/bin/timeout -k 100 12h /usr/bin/make KCFLAGS= -Wno-error=return-type -Wreturn-type -funsigned-char -Wundef W=1 --keep-going LLVM=1 -j24 -C source O=/kbuild/obj/consumer/x86_64-rhel-9.4-rust ARCH=x86_64 SHELL=/bin/bash rustfmtcheck make: Entering directory '/kbuild/src/consumer' make[1]: Entering directory '/kbuild/obj/consumer/x86_64-rhel-9.4-rust'

...

...

Diff in scripts/rustdoc_test_gen.rs at line 90:

            "No path candidates found for `{file}`. This is likely a bug in the build system, or \
            some files went away while compiling."
        ),

•    [valid_path] => {
  

•        valid_path.to_str().unwrap()
  

•    }
  

•    [valid_path] => valid_path.to_str().unwrap(),
     valid_paths => {
         eprintln!("Several path candidates found:");
         for path in valid_paths {
  

make[2]: *** [Makefile:1826: rustfmt] Error 123 make[2]: Target 'rustfmtcheck' not remade because of errors. make[1]: Leaving directory '/kbuild/obj/consumer/x86_64-rhel-9.4-rust' make[1]: *** [Makefile:248: __sub-make] Error 2 make[1]: Target 'rustfmtcheck' not remade because of errors. make: *** [Makefile:248: __sub-make] Error 2 make: Target 'rustfmtcheck' not remade because of errors. make: Leaving directory '/kbuild/src/consumer'

Yep, I already noticed this. Will send v2 with proper formatting.