syntax_data: {"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let source_info = self.source_info(scrutinee_span);
context_before:         if let Some(scrutinee_place) = scrutinee_place_builder.try_to_place(self) {
context_after:             self.cfg.push_place_mention(block, source_info, scrutinee_place);