I stumbled over the same bug and could verify the described behaviour:
* Setting locale to C.UTF-8 leads to an empty message window after
* Setting locale to e.g. de_DE.utf8 fixes the problem.
* Patrick's patch fixes the issue for me with C.UTF-8 as well.
On Wed, 12 Jul 2017 08:44:22 +0200 Patrick Brunschwig
> > The line you're getting an error on was definitely changed between 1.9.7
> > and 1.9.8 (it was changed in 30c1fe69a7c62007f925d760efc832884aed4412,
> > which overhauls the time calculations).
For me, these Versions are broken:
This version is ok: