{"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
            let const_loc = self.tcx.span_as_caller_location(span);
        self.mir.caller_location_span(source_info, self.caller_location, self.tcx, |span| {
            crate::constant::codegen_const_value(self, const_loc, self.tcx.caller_location_ty())