[forgetfool]

It's even crazier:

LOCKS UP (all proper files/func names) -
AddAutoloadDir("/home/romashka/.local/lib/avisynth")
a = FFAudioSource("audio.mp3")
v = FFVideoSource("video.AVI")
AudioDub(v, a)

LOCKS UP (no audio involved) -
AddAutoloadDir("/home/romashka/.local/lib/avisynth")
FFVideoSource("video.AVI")

RAISES AN ERROR (as expected, no such video) -
AddAutoloadDir("/home/romashka/.local/lib/avisynth")
FFVideoSource("no-such-video.AVI")

LOCKS UP (????????!!!!!)
AddAutoloadDir("/home/romashka/.local/lib/avisynth")
a = FFAudioSource("audio.mp3")
v = FFVideoSource("no-such-video.AVI")
AudioDub(v, a)

RAISES AN ERROR (as expected, wrong func name) -
AddAutoloadDir("/home/romashka/.local/lib/avisynth")
FFVideoSourceblahblahblah("no-such-video.AVI")

LOCKS UP (????????!!!!!)
AddAutoloadDir("/home/romashka/.local/lib/avisynth")
a = FFAudioSource("audio.mp3")
v = FFVideoSourceblahblahblah("no-such-video.AVI")
AudioDub(v, a)



LSMASHSource(), DirectShowSource(), FFmpegSource() all lock up (when using just them with a valid file)