// Overflow but we didn't notice.
av_assert0(put_bits_count(&pbc) <= 8 * priv->write_buffer_size);
+ if (err < 0) {
+ // Write failed for some other reason.
+ return err;
+ }
+
if (put_bits_count(&pbc) % 8)
unit->data_bit_padding = 8 - put_bits_count(&pbc) % 8;
else