Edit: Bisecting shows rBbf34b0c8f4b8 as the cause for the issue.
System Information @Kent Davis (mac4kent)
Operating system: Darwin-19.6.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 575 OpenGL Engine ATI Technologies Inc. 4.1 ATI-3.10.6
System Information @Alaska (Alaska)
Operating system: Linux-5.4.0-7634-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GTX 1050Ti 440.82
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-03 18:45, hash: rBb94ab93dfb82
Worked: Blender 2.82a, 2.83.0 release
Short description of error
Extruding a vertex on a sufficiently high poly mesh does not work and can appear to cause small graphical glitches in some cases.
Exact steps for others to reproduce the error
- Open Blender 2.90.
- Select the cube and sub-divide it a lot (I used a sub-division surface modifier with a level of 5 and applied it)
- Enter edit mode on the object and select a vertex.
- Attempt to extrude the vertex with E. This will not work. Attempting to do this on low poly objects, or with edges, or faces does not cause the issue.
Here's a .blend file with a high poly cube.
Original steps to reproduce:
Push the E key not work for Blender 2.90 June 3, 2020
Blender 2.83 it work push the E key I can see.
I did remove everything materials, texture, modifier (properties), rigging and thing complete.