Code review comment for lp:~alan-griffiths/mir/fix-1386646

> [ RUN ] DemoPrivateProtobuf.client_calls_server
> ==8885==
> ==8885== HEAP SUMMARY:
> ==8885== in use at exit: 211,741 bytes in 3,421 blocks
> ==8885== total heap usage: 9,029 allocs, 5,608 frees, 598,608 bytes allocated
> ==8885==
> ==8885== LEAK SUMMARY:
> ==8885== definitely lost: 0 bytes in 0 blocks
> ==8885== indirectly lost: 0 bytes in 0 blocks
> ==8885== possibly lost: 52,192 bytes in 940 blocks
> ==8885== still reachable: 159,549 bytes in 2,481 blocks
> ==8885== suppressed: 0 bytes in 0 blocks
> ==8885== Reachable blocks (those to which a pointer was found) are not shown.
> ==8885== To see them, rerun with: --leak-check=full --show-leak-kinds=all
> ==8885==
> ==8885== For counts of detected and suppressed errors, rerun with: -v
> ==8885== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
>
> test 11

:(

It appears the race is unrelated to this test failure.