{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"#[rustc_const_panic_str]"}]}
    #[rustc_const_panic_str] // enforce a &&str argument in const-check and hook this by const-eval
mod panicking {
    pub const fn panic_display<T: crate::fmt::Display>(x: &T) -> ! {