Segmentation fault when trying to detect collisions in breakout

Question

This line of code results in the error Segmentation Fault (Core dumped):

collision = detectCollision(window, ball);

if (strcmp(getType(collision), "GRect") == 0)
{
    // TODO           
}

What is causing the segfault and how can I fix it?

Answer 1

You may also have to make sure it's not null before you try to pass it into getType(). detectCollision will return null when there are no collisions.

Answer 2

What type have you initialized the variable "collision" to be? If you initialized it as a string, that could be the issue.

Make sure you are initializing it as:

GObject collision = detectCollision(window, ball);