FastLED on Arduino with int[] Array - c

Question

I built a LED Matrix with ws2812b LEDs. It is driven by an arduino nano. I use the CLED lib in combination with FastLED. It works fine!
Now I have a very simple routine here that wont work although there is no error or warning.
The problem seems to be the array which is a path of LEDs I want to activate.
So what am I missing? When I activate this on the arduino it freezes. The getRandomColorValue() function simply returns a color value 0-255. that one works like a charm.
int outlinePath[] = {30, 31, 29, 28, 27, 26, 26, 42, 43, 44, 45, 46, 25, 9, 8, 0, 1, 2, 4, 3, 16, 17, 56, 57, 91, 92, 101, 102, 111, 112, 121, 122, 162, 192, 193, 229, 230, 262, 263, 274, 275, 276, 277, 270, 269, 254, 239, 240, 241, 242, 243, 244, 253, 252, 251, 250, 249, 211, 210, 176, 177, 178, 179, 175, 161, 152, 151, 142, 141, 132, 131, 77, 72, 73, 74, 75, 76, 37, 31};
FastLED.clear();
for (int i = 0; i < 70; i++) {
int test = outlinePath[i];
leds.m_LED[test] = CRGB(getRandomColorValue(), getRandomColorValue(), getRandomColorValue());
}
FastLED.show();
delay(1000);
And this one works very well:
void progFastBlingBling() {
FastLED.clear();
leds.m_LED[random(0, anz_LEDs)] = CRGB(getRandomColorValue(), getRandomColorValue(), getRandomColorValue());
FastLED.show();
}