syntax_data: {"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                 if let Some(scope) = scope.temp_lifetime {
context_before:                     .push(block, Statement::new(source_info, StatementKind::StorageLive(result)));
context_after:                     // schedule a shallow free of that memory, lest we unwind: