Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: AMD Radeon(TM) RX Vega 11 Graphics ATI Technologies Inc. 4.5.13571 Core Profile Context 19.8.2 26.20.13001.40003
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e
Short description of error
Force close when using loop cut
Exact steps for others to reproduce the error
select the object > Z (wireframe mode) > apply loop cut > undo the loop cut(s).
ps: some times it happens after applying around >5 one (not loop cut with multiple cuts) loop cuts, if the FC doesn't occur, you need to do a lot of (one) loop cuts first and then undo them until the FC occurs. if it still doesn't happen even after a lot of loop cuts and undo, keep applying several one loop cut and then keep undoing them until the FC occurs.
I tried this many times and it happens every time.