This library is used for the Yahboom Smart Robot Car, and the program provided for that car uses bluetooth ("Extension bluetooth is incompatible with neopixel. Remove bluetooth and add neopixel?").
Any plans to remove the NeoPixel dependency?
This can be resolved by forking the neopixel and pxt-ws2812b libraries, then removing line 30 ("cpsid i ; disable irq") in sendBuffer.asm