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NURBS Surface Edit Mode: Spline Cage of Unselected Surface Is Not Fully Rendered
Closed, ResolvedPublicBUG

Description

System Information
Operating system: Linux-5.9.6-gentoo-bertha-x86_64-Intel-R-_Xeon-R-_CPU_E5-2630_v4_@_2.20GHz-with-gentoo-2.7 64 Bits
Graphics card: llvmpipe (LLVM 9.0.1, 256 bits) VMware, Inc. 3.3 (Core Profile) Mesa 20.1.10

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2020-12-29 18:57, hash: rBc1740e9ad02d
Broken: (first bad) 2.92.0 Alpha, branch: master, commit date: Fri Nov 13 21:43:00 2020 +0100, hash: rB0be88c7d15d2ad1af284c6283370173647ae74eb
Worked: (last good) 2.92.0 Alpha, branch: master, commit date: Fri Nov 13 13:56:55 2020 -0500 hash: rB9d28353b525e
Worked: version: 2.91.0 Release, branch: master, date: Wed Nov 25 09:34:47 2020 +0100 hash: 0f45cab862b8

Short description of error
Where a NURBS surface object has two or more disjoint surfaces, in Edit Mode only the actively edited surface is drawn with the control cage in bold, red/gold lines. The other surfaces have control cages drawn with narrower lines in muted colors. See the following screen shot:


With the first bad commit, the muted cages are no longer being drawn, see following:

Exact steps for others to reproduce the error
Open the following blend file in the current 2.91 Release, where NURBS surfaces will be rendered correctly in edit mode. Compare that when opening this file in the current 2.92.0 master branch from the first bad commit on wards.