{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"//"}]}
        // possibly fail is for SIMD types which don't #[derive(Copy)].
        // Check that the type implements Copy. The only case where this can
        if !self.fcx.type_is_copy_modulo_regions(self.fcx.param_env, ty) {