linux-kernel - Re: [PATCH] panic: improve panic output from Rust panics

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Message-ID: <202506200907.0hDFXWmf-lkp@intel.com>
Date: Fri, 20 Jun 2025 09:34:12 +0800
From: kernel test robot <lkp@...el.com>
To: Alice Ryhl <aliceryhl@...gle.com>, Arnd Bergmann <arnd@...db.de>,
	Miguel Ojeda <ojeda@...nel.org>, Kees Cook <kees@...nel.org>,
	Tony Luck <tony.luck@...el.com>,
	"Guilherme G. Piccoli" <gpiccoli@...lia.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.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>,
	Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org,
	linux-hardening@...r.kernel.org, Alice Ryhl <aliceryhl@...gle.com>
Subject: Re: [PATCH] panic: improve panic output from Rust panics

Hi Alice,

kernel test robot noticed the following build errors:

[auto build test ERROR on 19272b37aa4f83ca52bdf9c16d5d81bdd1354494]

url:    https://github.com/intel-lab-lkp/linux/commits/Alice-Ryhl/panic-improve-panic-output-from-Rust-panics/20250619-231923
base:   19272b37aa4f83ca52bdf9c16d5d81bdd1354494
patch link:    https://lore.kernel.org/r/20250619-rust-panic-v1-1-ad1a803962e5%40google.com
patch subject: [PATCH] panic: improve panic output from Rust panics
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250620/202506200907.0hDFXWmf-lkp@intel.com/config)
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/20250620/202506200907.0hDFXWmf-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/202506200907.0hDFXWmf-lkp@intel.com/

All errors (new ones prefixed by >>):

>> error[E0277]: `core::option::Option<&core::fmt::Arguments<'_>>` doesn't implement `core::fmt::Display`
   --> rust/kernel/lib.rs:210:36
   |
   210 |     match core::format_args!("{}", info.message()) {
   |                                    ^^^^^^^^^^^^^^ `core::option::Option<&core::fmt::Arguments<'_>>` cannot be formatted with the default formatter
   |
   = help: the trait `core::fmt::Display` is not implemented for `core::option::Option<&core::fmt::Arguments<'_>>`
   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
   = note: this error originates in the macro `core::format_args` (in Nightly builds, run with -Z macro-backtrace for more info)

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