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Specific scene multiple case crashes, but mostly on render
Closed, ResolvedPublic


System Information
Win7 x64 8GB , Radeon R9 270 , PhenomII 1090T x6

Blender Version
Broken: 2.78 e8299c8(Steam) - 6b9d73e(official buildbot),
Worked: -

Short description of error
Attached scene crash blender randomly on most any action - sometime on objects movement, changing viewport mode, save/reloading, and rendering
Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps

Stable repeatable:

  1. Load scene
  2. Press F12 to start renderng - it begin to load resources/build bvh and then crash

Unknown repeatability:

  1. press alt+z to change viewport mode


  1. resave scene with another name
  2. ? close blender
  3. try open blender and saved scene

Event Timeline

Vik (V) created this task.Mar 4 2017, 12:08 PM
Vik (V) updated the task description. (Show Details)Mar 4 2017, 12:19 PM
Sergey Sharybin (sergey) lowered the priority of this task from 90 to 50.Mar 9 2017, 11:29 AM

Can confirm the issue. It seems to be caused by array modifier delivering broken topology. This screws up boolean modifier here and could potentially break other areas of blender. So this is first thing to be fixed before we can check if there are more issues here.

I've simplified the case to a single object:

You can apply modifier and run mesh validation and you'll see lots of unused loops.

@Germano Cavalcante (mano-wii), @Bastien Montagne (mont29) or maybe @Patrice Bertrand (PatB) can help having a look here? :)

Quick fix: use a correct merge distance, compatible with your mesh level of details! Here 0.01 is way to high and eats several initial loops of next copy, 0.001 seems to work properly.

Will check why merge generates invalid geometry, though…