Blit Surface causes window to crash

[sujaldev]

When I create a window approximately greater than 800x800, calling SDL_BlitSurface freezes the window with cpu usage spiking upto 100% and then exits with the following message:

Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)

I am not so familiar with lower level languages but from what a quick google search tells me this is a segmentation fault, any tips on how to fix this?

^Context

[chrishtr]

Interesting. SIGSEGV means that the program tried to read an illegal place memory, due to an error coding, usually a null dereference or use-after-free.

I tried WIDTH, HEIGHT = 1000, 1000 just now and it worked fine on my machine.

My guess is your code has a bug that the surfaces you're copy to and from via SDL_BlitSurface have different dimensions.

[sujaldev]

Turns out the dimensions weren't the problem but the use-after-free problem. I was storing the pixel data returned by tobytes in a local variable which was being garbage collected when it was larger by python and SDL_CreateRGBSurfaceFrom doesn't copy that data but keeps a pointer to the same variable.
Thanks for your help anyways!!

[chrishtr]

Great, glad you found the bug.

[chrishtr]

I fixed the text also.