I want to do some analysis of my program with the help of the "Code Coverage" option which is availible within the IDE. 
My problem is that after I switch on that option in the Project Properties (Properties -> QNX C/C++ Project -> Options -
> Build with Code Coverage) I get an error message ...

D:/QNX_Experiments/Benchmark_001/utilfunc.c:228: internal compiler error: output_operand: invalid expression as operand

the code which belongs to this error is ...

void exec_cvn_matrix(	bm_image* 	source,
						bm_image*	destination,
						conv_5x5 	matrix)
{
	int x = 0;
	int y = 0;
	int x_max = source->width;
	int y_max = source->height;

	for(x = 0; x < x_max; x++)
	{
		for(y = 0; y < y_max; y++)
		{
			cvn_matrix_point(source,destination,&matrix,x,y);
		}
	}
}                    //  <- This line is 228

What really kills me is that after i replaced the void-type as the return type of that function and set an int instead 
the compiler is happy. Is that behaviour of the compiler okay?