syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"this.cfg.push_coverage_span_marker(block,"}]}
source_snippet:                             this.cfg.push_coverage_span_marker(block, this.source_info(expr_span));
context_before:                         if this.tcx.sess.instrument_coverage() {
context_after:                         }