From: Allan Sandfeld Jensen <allan.jensen@qt.io>
Date: Fri, 07 Sep 2018 09:52:58 GMT
Subject: Old submodules broken in 2.19rc1 and 2.19rc2
Message-ID: <2659750.rG6xLiZASK@twilight>

Submodules checked out with older versions of git not longer works in the 
latest 2.19 releases. A "git submodule update --recursive" command wil fail 
for each submodule with a line saying "fatal: could not open 
'<submodule>/.git' for writing> Is a directory.

I checked the release notes so far, and they do not say the old submodules 
from git 2.16- were no longer supported, so I assume it is a bug?

'Allan