Hi,
I see that the presence of isolation tests in the patch is
controversial. First things first, let's concentrate on fixing the
bug.
I attach a new version of patch (for `master` branch) to this letter.
It contains better comments and a few small improvements.
P.S.
Sorry for bad formatting in previous letter (idk how to fix it in gmail client)
--
Best regards,
Daniil Davydov