Thanks, developers! Just installed the 2018-10-01 development build, and noticed two nice things:
1. My music player works again, although the monoaural files still play too fast. Must be tricky getting that fixed for Linux and Windows at the same time!! Stereo is flawless. Also had one recurrence of the compilation error when trying to load a mono wav file, but on the second attempt, it loaded and played (too fast).
2. I like the line numbers showing up in the IDE. Well done. Plus, the width of that column depends on how many lines your program has, so it's as narrow as possible.
All in all, a happy improvement over the 2018-09-24 version (or whatever it was that broke the music player).