reproduce (this is a W=1 build):
        git checkout 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
        b4 shazam https://lore.kernel.org/r/20250619-rust-panic-v1-1-ad1a803962e5@google.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash CLIPPY=1 rustdoc