Erase undo stack when load a savegame

[Toranks]

I've tried putting all sorts of actions in a preload event, but whatever I do doesn't stop loading a savegame from undoing the last move before saving the save. Even if I create a unit and generate a random number, two actions that are not supposed to be undone. The unit is created but I can undo the last movement previously saved.

Code: Select all

[event]
     name=preload
     first_time_only=no
[filter_condition]
    some conditions
[/filter_condition]
     {VARIABLE_OP disallow_undo rand(0..1)}
     {NAMED_GENERIC_UNIT 1 Peasant 1 1 dummy Dummy}
[/event]

The question is, is it technically possible to cancel/avoid undoing when loading a savegame via a preload event or similar, which allows filtering conditions?

The goal is to avoid a crash when certain events that contain [on_undo] are executed. #7253

[Pentarctagon]

Note that preload events aren't synchronized, so depending on what you use them for it can cause issues in online multiplayer games and replays.