ext/libuv/src/unix/pthread-barrier.c in libuv-3.1.3 vs ext/libuv/src/unix/pthread-barrier.c in libuv-3.1.4

@@ -71,10 +71,11 @@
      wake up waiters, unlock the mutex, then return
      PTHREAD_BARRIER_SERIAL_THREAD. */
   if (++b->in == b->threshold) {
     b->in = 0;
     b->out = b->threshold - 1;
-    assert(pthread_cond_signal(&b->cond) == 0);
+    rc = pthread_cond_signal(&b->cond);
+    assert(rc == 0);
 
     pthread_mutex_unlock(&b->mutex);
     return PTHREAD_BARRIER_SERIAL_THREAD;
   }
   /* Otherwise, wait for other threads until in is set to 0,