linux-kernel - Re: [PATCH 1/6] rust: num: add `shr` and `shl` methods to `Bounded`

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Message-ID: <202601202328.hnTsogt9-lkp@intel.com>
Date: Wed, 21 Jan 2026 00:12:43 +0800
From: kernel test robot <lkp@...el.com>
To: Alexandre Courbot <acourbot@...dia.com>,
	Miguel Ojeda <ojeda@...nel.org>, Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <lossin@...nel.org>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>,
	Yury Norov <yury.norov@...il.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	John Hubbard <jhubbard@...dia.com>,
	Alistair Popple <apopple@...dia.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	Timur Tabi <ttabi@...dia.com>, Edwin Peer <epeer@...dia.com>,
	Eliot Courtney <ecourtney@...dia.com>,
	Daniel Almeida <daniel.almeida@...labora.com>,
	Dirk Behme <dirk.behme@...bosch.com>,
	Steven Price <steven.price@....com>, rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alexandre Courbot <acourbot@...dia.com>
Subject: Re: [PATCH 1/6] rust: num: add `shr` and `shl` methods to `Bounded`

Hi Alexandre,

kernel test robot noticed the following build errors:

[auto build test ERROR on 2af6ad09fc7dfe9b3610100983cccf16998bf34d]

url:    https://github.com/intel-lab-lkp/linux/commits/Alexandre-Courbot/rust-num-add-shr-and-shl-methods-to-Bounded/20260120-143042
base:   2af6ad09fc7dfe9b3610100983cccf16998bf34d
patch link:    https://lore.kernel.org/r/20260120-register-v1-1-723a1743b557%40nvidia.com
patch subject: [PATCH 1/6] rust: num: add `shr` and `shl` methods to `Bounded`
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20260120/202601202328.hnTsogt9-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260120/202601202328.hnTsogt9-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601202328.hnTsogt9-lkp@intel.com/

All errors (new ones prefixed by >>):

>> error[E0658]: const arguments cannot yet be inferred with `_`
   --> rust/doctests_kernel_generated.rs:10572:47
   |
   10572 | let v_shifted: Bounded::<u32, 8> = v.shr::<8, _>();
   |                                               ^
   |
   = note: see issue #85077 <https://github.com/rust-lang/rust/issues/85077> for more information
   = help: add `#![feature(generic_arg_infer)]` to the crate attributes to enable
   = note: this compiler was built on 2025-06-23; consider upgrading it if it is out of date
--
>> error[E0658]: const arguments cannot yet be inferred with `_`
   --> rust/doctests_kernel_generated.rs:10630:48
   |
   10630 | let v_shifted: Bounded::<u32, 16> = v.shl::<8, _>();
   |                                                ^
   |
   = note: see issue #85077 <https://github.com/rust-lang/rust/issues/85077> for more information
   = help: add `#![feature(generic_arg_infer)]` to the crate attributes to enable
   = note: this compiler was built on 2025-06-23; consider upgrading it if it is out of date

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki