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Setting Workbench as Render Engine blocks loading of icon previews
Confirmed, NormalPublicBUG


System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 860M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86

Blender Version
Broken: version: 2.81 (sub 2), branch: master, commit date: 2019-08-17 21:40, hash: rBe69fb4402702

Short description of error
Setting Workbench as Render Engine blocks loading of icon previews, while setting it to EEVEE or Cycles does not.

Exact steps for others to reproduce the error

  1. Open attached blend file:
  2. Use Run Script and check TEST tab in Sidebar (icon loads).
  3. Change Render Engine to Workbench and use Run Script again (icon does not load).

Event Timeline

Philipp Oeser (lichtwerk) lowered the priority of this task from 90 to 50.Aug 21 2019, 6:27 PM

Interesting, will have a quick look...

Afaict, bpy_utils_previews_load does its thing in three cases without something obvious going wrong, needs some further investigation still :(

Philipp Oeser (lichtwerk) changed the subtype of this task from "Report" to "Bug".Jan 31 2020, 10:06 AM