This seems to happen from time to time when playing. I think that the buffer underflow always happens right before.
[../deps/mpg123/src/output/coreaudio.c:81] warning: Didn't have any audio data in callback (buffer underflow)
#
# Fatal error in ../deps/v8/src/api.h, line 297
# CHECK(allow_empty_handle || that != __null) failed
#
[1] 665 abort node .