After some discussion, the core committee has concluded that the WAL-replay bug fixed in commit 6bfa88acd3df830a5f7e8677c13512b1b50ae813 is indeed bad enough to justify near-term update releases. Since there seems no point in being slow about it, tarballs will be wrapped Monday (3/17) for public announcement Thursday (3/20).
Regarding:
Prevent intermittent "could not reserve shared memory region" failures on recent Windows versions (MauMau)
Could you include the patch I sent for 9.0/9.1 in response to Magnus san?