+ is(readline($rb), $exp, "SHA big for EMSGSIZE ($t)");
+
+ # to hit the WQWorker recv_and_run length
+ substr($bigger, my $MY_MAX_ARG_STRLEN = 4096 * 33, -1) = '';
+ $ipc->wq_io_do('test_sha', [ $wa, $wb ], $bigger);
+ $exp = sha1_hex($bigger)."\n";
+ is(readline($rb), $exp, "SHA WQWorker limit ($t)");