{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"if"}]}
                if !self.mir_assign_valid_types(op_src_ty, op_dst_ty) {
                // we only need to check that they are equal and not keep an extra parameter.
                    self.fail(location, format!("bad arg ({op_src_ty} != {op_dst_ty})"));