Flaky Test in Syzygy Asan

[NikolaJanevski]

This test is flaky only when running in 64 bit Release mode.
See this unsuccessful attempt to fix it: https://codereview.chromium.org/2918423002/

Assigned to myself @njanevsk@google.com as a low priority.

[randomascii]

Can you include more details about what the bug is? Which test is flaky, how frequently does it fail, in which way does it fail? Excerpts from the output when it fails could be helpful.

A flaky asan test sounds like a race condition (???) which seems worthwhile trying to fix, but more information is needed.