Internal error: passing struct to built-in function not properly caught

[derrell]

#include <stdio.h>
#include <math.h>
#include <draw.h>

typedef struct color{int r; int g; int b;}color;

void drawCircle(int x, int y, int rad, color c);

int main(int argc, char * argv[])
{
 color c;

 c.r = 160;
 c.g = 0;
 c.b = 0;
 drawCircle(50, 50, 200, c);
 return 0;
}

void drawCircle(int x, int y, int rad, color c)
{
}