desync_object_var_set_in_draw_script

Draw scripts are called differently for each player in an online match.

If a draw script contains code that can effect the gameplay logic in any way, it can cause one player's game to be in a different state than the other's. This causes a 'desync,' making the character unplayable online.

Draw scripts are all scripts ending in _draw.gml, plus init_shader.gml and draw_hud.gml.

// post_draw.gml
x += 1  // WARN: Possible Desync. Object var set in draw script. Consider using `var` or creating constants in `init.gml`.

Resolution

If the variable is only needed locally, just put var before it, so that it won't exist outside the current script.

If you only need to read the variable, and it's needed in multiple files, initialize it in init.gml or another synced script.

If the variable is needed in multiple files, and the draw script needs to change it, double check there isn't a safer way to do what you're doing. If you're sure, disable the warning with // NO-WARNING or commenting it out in assistant/assistant_config.yaml