{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"span_bug!(self.cur_span(),"}]}
            span_bug!(self.cur_span(), "cannot allocate space for `extern` type, size is not known")
        let Some((size, align)) = self.size_and_align_from_meta(&meta, &layout)? else {
        };