syntax_data: {"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":"tcx.emit_node_span_lint("}]}
source_snippet:         tcx.emit_node_span_lint(
context_before:         let block_span = tcx.sess.source_map().guess_head_span(block_span);
context_after:             UNUSED_UNSAFE,