``` src/lib/tls/tortls_openssl.c: In function ‘tor_tls_release_socket’: src/lib/tls/tortls_openssl.c:1172:5: error: value computed is not used [-Werror=unused-value] BIO_set_close(rbio, BIO_NOCLOSE); ^ src/lib/tls/tortls_openssl.c:1175:5: error: value computed is not used [-Werror=unused-value] BIO_set_close(wbio, BIO_NOCLOSE); ^ cc1: all warnings being treated as errors make: *** [src/lib/tls/src_lib_libtor_tls_a-tortls_openssl.o] Error 1 ``` https://travis-ci.org/torproject/tor/jobs/428655734