syntax_data: {"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let idx = self.effect(Effect::Primary.at_index(location.statement_index));
context_before:     ) -> TerminatorEdges<'mir, 'tcx> {
context_after:         assert!(state.insert(idx));