So I was going to start a new topic and I found this thread. I have the same exact problem, hence, posting here.
I can confirm that this started happening only after I updated to Logic 10.4. Haven't updated to High Sierra.
I can accurately reproduce this particular crash every single time.
Steps:
1.Arm an audio track
2.Press the space-bar (Play)
3.Hit record, while it's playing (quick punch)
4.When you're done, press the space-bar again (Stop) While it's recording
5.Immediate Crash
You also end up losing that take.
The only way to avoid the crash, once you've already hit 'record', is to hit 'record' again (toggle) BEFORE hitting stop.
This crash doesn't happen if you start recording while in STOP mode. (Logic not already playing)
Attaching a screen recording link for you to see. The point where Logic crashes is when I hit stop on the keyboard.
https://drive.google.com/file/d/1QINicpN2eFr0PXpu2GwiisqJS2Zd3LXl/view?usp=sharing