Fix use-after-free of stack-allocated temporary string.

        return false;

    }

    std::string mapping_file("/system/etc/selinux/mapping/" + vend_plat_vers + ".cil");

    const std::string version_as_string = std::to_string(max_policy_version);

    // clang-format off

    const char* compile_args[] = {

        "/system/bin/secilc",

        plat_policy_cil_file,

        "-M", "true", "-G", "-N",

        // Target the highest policy language version supported by the kernel

        "-c", std::to_string(max_policy_version).c_str(),

        "-c", version_as_string.c_str(),

        mapping_file.c_str(),

        "/vendor/etc/selinux/nonplat_sepolicy.cil",

        "-o", compiled_sepolicy,