FastLED (v3.6.0) + WS2812Serial Broken in Teensyduino 1.59?

[gfvalvo]

Teensyduino 1.59 ships with FastLED 3.6.0. This combination doesn't work with WS2812Serial. The code hangs on the call to "pLed->init();" in the addLeds() function of FastLED.cpp:

CLEDController &CFastLED::addLeds(CLEDController *pLed,
								  struct CRGB *data,
								  int nLedsOrOffset, int nLedsIfOffset) {
	int nOffset = (nLedsIfOffset > 0) ? nLedsOrOffset : 0;
	int nLeds = (nLedsIfOffset > 0) ? nLedsIfOffset : nLedsOrOffset;

	pLed->init();
	pLed->setLeds(data + nOffset, nLeds);
	FastLED.setMaxRefreshRate(pLed->getMaxRefreshRate(),true);
	return *pLed;
}

To reproduce the issue, simply try the "FastLED_Cylon.ino" example that ships with Teensyduino. My setup was Arduino 1.8.19 + Teensyduino 1.59 + FastLED 3.6.0 on a T3.6 baord.

I first posted this as a question on the Forum here.

Paul has already reproduced the problem.

[gfvalvo]

So as far as I can tell, it's not just WS2812Serial and FastLED (v3.6.0) that are broken with Teensyduino 1.59. Rather Teensyduino 1.59 does not work with FastLED AT ALL. Period. I tried the most basic example included with FastLED (Blink.ino) and it fails with simply the 'NEOPIXEL' LED strip type selected. It hangs somewhere inside:
FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
It never returns from that function call.

I tried it with FastLED v3.6, v3.5, v3.4, and v3.3.3. They all fail.

Teensyduino 1.54 works just fine with FastLED. I tested it with v3.6 and v3.5.

[PaulStoffregen]

fixed with 638a207