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Blender 2.8 - Editing instances with modifiers causes issues
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System Information
Operating system: Linux 17.10
Graphics card: GTX 1080

Blender Version

Short description of error
Editing instances with modifiers causes issues

Exact steps for others to reproduce the error

  1. open attached blend file
  2. tab in (blender 2.7x keymap)
  3. notice how all the instances now have the modifier applied to them?
  4. press g and move your mouse around really fast for around 5-10 seconds
  5. crash

I previously mentioned something similar to this in T58652 but this seems like it is not to do with shape keys at all, so i created a new one.



Event Timeline

Dalai Felinto (dfelinto) triaged this task as Confirmed, Medium priority.

I managed to reproduce a crash. Assuming is the originally reported:

SUMMARY: AddressSanitizer: heap-use-after-free //source/blender/blenkernel/intern/mesh_runtime.c:184 in BKE_mesh_runtime_clear_edit_data
Full ASAN report: P862

@Sergey Sharybin (sergey) it seems the data is allocated in T15, yet freed by thread 0. Aren't we suppose to only allocate memory from the main thread?