Calling input.select() without a prompt argument was failing due to attempting to concatenate a nil value. Before mpv 0.40 the prompt defaulted to ">" so this is expected to work as evident from the example code.
Calling input.select() without a prompt argument was failing due to attempting to concatenate a nil value. Before mpv 0.40 the prompt defaulted to ">" so this is expected to work as evident from the example code.