syntax_data: {"ast_node_type":"function","tokens":[{"end":81,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet: pub fn span_bug_fmt<S: Into<MultiSpan>>(span: S, args: fmt::Arguments<'_>) -> ! {
context_before: #[track_caller]
context_after:     opt_span_bug_fmt(Some(span), args, Location::caller());