According to one version of the manual, var_nsave is replaced by a suffix of _n.
var continue_handle_n = 0;
That is, any var with a name ending in _n, might NOT be saved by an invocation of game_save.
Of course, as expected, that might be consistent with the current trend of absurdity (=correctness).
Feel free to do a search in some version of the manual for term "DYNAMIC", or don't, that's OK too.
On a more or less relevant note: Perhaps, it was suggested that jcl would be 'out' for a week, but maybe not.
'I' am not one of the developers from the aptly named forum category "Ask the Developers".