I encoded opus with all those combinations of parameters below, using Emre's build. There were no crashes, nor failure to output the files. 10x4x7x8x4 x 9 = 80,640 encoded opus files.
["","--bitrate 8.000", "--bitrate 16.000", "--bitrate 32.000", "--bitrate 48.000", "--bitrate 64.000", "--bitrate 96", "--bitrate 128", "--bitrate 160", "--bitrate 320"],
["","--vbr", "--cvbr", "--hard-cbr"],
["","--framesize 2.5", "--framesize 5", "--framesize 10", "--framesize 20", "--framesize 40", "--framesize 60"],
["","--comp 0", "--comp 2", "--comp 4", "--comp 6", "--comp 8", "--comp 9", "--comp 10"],
["","--expect-loss 75","--expect-loss 50", "--expect-loss 25"]
20 seconds of 7 artificial signal tracks and about 20 seconds of 2 music tracks, total 9 tracks were used as test tracks.
19.95 spray_can_noise_right.wav
19.86 Tom's Diner.wav
20 sin_441Hz.wav
20 sin_20000Hz.wav
20 maxwave_88k_20.wav
20 sinsweep_88k_20.wav
20 noise_20.wav
20 pinknoise_88k_20.wav
20 whitenoise_88k_20.wav