[xekon]

thank you for the reply Jackoneill, i will try -02, and thanks for telling me how to debug it in linux.

thanks for the reply Are_, very interesting you dont have the bug, that leads me to believe its a problem with the compiler i have on my linux machine, i will try GCC-5.4.0 if thats not what im currently using.

Thank you for the reply Jackoneill. I removed -ffast-math from configure and replace all instances of long with int64_t.
Also if I comment out the gradcurve filter then it does not introduce the artifacts.

After making the changes to the project, the windows one still works, and the linux one still has the artifacts.
could it be anything else in configure that is causing it?

I also tried removing -mfpmath=sse, but it had no effect either.

PS: Also its worth mentioning, the Artifacts, are always in the exact same spot, it is only affecting certain pixels, im gonna try and step through the program to see if anything obvious jumps out at me.
but since I am debugging on windows(where there are no artifacts) I am not so sure that anything will be obvious to me.