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I encounter a strange bug, let show it with a few line of code:
make sure you have Matrix1Utils installed



runs OK..


Introduce a function pointer:



Still OK...


Introduce a data statement:




And the app silently exits without saying goodbye......
Same thing with ordinal instead of function name..


1) Can anyone confirm ? I'm running rc7 and Windows Vista... maybe something wrong with my dbp install..

2) Is there a stupid thing I forgot ?

3) Anyone has a clue ???

Thanks..

I recall seeing this problem previously. Although there is a small syntax issue in your final example, the problem remains even after correcting;



From memory, I think other threads discussing this bug came to the conclusion of, don't use the DATA command (but I could be wrong).

This is just conjecture on my part, but the data statements actually insert values into a contiguous block stored in the executable itself when it is compiled. The get ptr to function functions probably just assume that the function table of the executable start at a certain offset, but the data block comes before that and as such offsets this table, making it read what it thinks is the proper function address. When then calling this function address you'll get a crash because there is no runable code at the pointed-to location. Funkier things could probably happen if whatever the pointer is pointing to does indeed correspond to a valid function declaration (you could probably even try to hack your own binary functions into your programs using the afforementioned DATA statements and attempt to execute that... that could be an interesting undertaking actually ). Of course it is extremely unlikely that an invalid function pointer offset read in this manner will actually resolve to executable code and as such the crash is the most likely outcome.

Thank you for responding,
Indeed the issue has already been discussed and I missed it:
http://forum.thegamecreators.com/?m=forum_view&t=206498&b=1
So I will work around this!