Java Exception at resume game @ task.on_complete_changed

[Lineflyer]

Copied from biylda/WhereYouGo#8

Hi!

Hopefully this is the correct place to report potential bug as the exception references openwig.googlecode.com which seem to have move.

Suprisingly a could't find this problem mentioned below, but probably I searched at the wrong places.

In the middle of the development of my cartridge - which work well in the urwigo-simulator also with no problems with save/and resume - I testet it on the smartphone: Lot's of java exceptions when I resumed a saved game: especially index of non-table and calling nil! I updated to the current version
same result.
So i started to analyse the problems. I am using tasks (also partly LUA-function in there). The problem at the resume-time seem to be, that the taskcompletion is called (which migth be ok and is ok to me), but there aren't any "objects" already "initiated"!
So a call of e.g.:

lua-function (call nil)
setting an attribute of item, character,.. (index of non-table)
move item to player
...

fail, as all "the reference" is nil and I think this is bug.

Of course I can implement a workaround, but I have to put it in many task ...
So probably there is a simpler workaround (some settings) or I did something wrong, ...

I implemented an easy cartrige, to eliminate potential problem caused by me.
I attach this simple/short cartrige with no lua and just in urwigo (urwigo und compiled code attached) for reproduction of this problem:

Start cartrige
Schweizermesser.CloseTask
Exit with save
Start with resume -> java exception (just for a short time)
Exit no save -> java exception (til press away)

I'am currently working with urwigo and on an Samsung GT-S5690 Android: 2.36 /Gingerbread ( Kernel2.6.35.7).

If additional Information is need just let me know.

Thanx in advance for help or fixing the bug
hansmen

testtask.zip