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Maniphest T54309

Object is redrawn in the previous to last position.
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Description

System Information
Os: Linux (archlinux,gcc7.3,glibc2.26)
Gpu: Nvidia gtx 970 (driver 390.25)

Blender Version:

Blender 2.80 (sub 5)
build date: 2018-03-13
build time: 17:09:27
build commit date: 2018-03-13
build commit time: 16:08
build hash: 585208e0e91

Short description of error
When using new "copy-on-write" dependencies graph, objects get redrawn in previous to last position after transformation (translate/rotate/scale)

Exact steps for others to reproduce the error

  1. Select Suzanne
  2. Move it to the new location or rotate/scale
  3. Select another object
  4. Suzanne "jumps" to its previous to last position/rotation/scale


copy-on-write-position-reset.blend108 KBDownload

Event Timeline

bartus sz (bartus) created this task.Mar 13 2018, 6:18 PM
bartus sz (bartus) updated the task description. (Show Details)
Vuk Gardašević (lijenstina) added a project: BF Blender: 2.8.Mar 13 2018, 6:29 PM
Vuk Gardašević (lijenstina) changed the task status from Unknown Status to Unknown Status.Mar 13 2018, 6:33 PM
Vuk Gardašević (lijenstina) claimed this task.
Vuk Gardašević (lijenstina) added a subscriber: Vuk Gardašević (lijenstina).

Thank you for the report. Currently we are aware of many issues in 2.8 and actively working to fix them.
But since replying to reports takes time, we have decided to limit bug reports to module team members.

For the time being, closing this report.

Dalai Felinto (dfelinto) added subscribers: Sergey Sharybin (sergey), Dalai Felinto (dfelinto).Mar 14 2018, 1:46 PM

Fun bug. But yes copy on write is heavily under development by @Sergey Sharybin (sergey) and nowhere ready for public consumption. Thus not open for bug reports.

Also the file as it is doesn't even open in 2.8 with copy on write:

BLI_assert failed: /blender/source/blender/depsgraph/intern/builder/deg_builder_relations.cc:2124, build_copy_on_write_relations(), at 'object->type == OB_EMPTY'

I had to open without copy-on-write, delete the viewport layer, and re-open with --enable-copy-on-write to reproduce the issue.