{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
                let expr_ty = fcx.resolve_vars_if_possible(self.expr_ty);
                let cast_ty = fcx.resolve_vars_if_possible(self.cast_ty);
                fcx.dcx().emit_err(errors::CastThinPointerToWidePointer {