syntax_data: {"ast_node_type":"variable","tokens":[{"end":39,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let expr = &self.thir[expr_id];
context_before:     ) -> BlockAnd<PlaceBuilder<'tcx>> {
context_after:         debug!("expr_as_place(block={:?}, expr={:?}, mutability={:?})", block, expr, mutability);