reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/melver/linux.git/commit/?id=2467f2e4963fe6816b3549ffd5da27e749108b21
        git remote add melver https://git.kernel.org/pub/scm/linux/kernel/git/melver/linux.git
        git fetch --no-tags melver kasan/dev
        git checkout 2467f2e4963fe6816b3549ffd5da27e749108b21
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash lib/