{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"sess.psess.bad_unicode_identifiers.with_lock(|identifiers|"}]}
    sess.psess.bad_unicode_identifiers.with_lock(|identifiers| {
    // Gate identifiers containing invalid Unicode codepoints that were recovered during lexing.
        for (ident, mut spans) in identifiers.drain(..) {