I'm markings resolved as current savegame import benchmark will abort loading if
it thinks your savegame is corrupted.

At least if a data type differs it aborts the loading.
I also tested with another old savegame -- which I didn't played, various
complains about invalid virtual position and a print_trace() but yet no error
message ingame.

I think the current savegame benchmark solves this issue and I'm therefore
closing it. However if you find a incompatibility which will spam the player
still present, fell free to reopen this, open a new report, or even do a patch.