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Maniphest T49905

Segfault when copying object data of linked object
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Description

I'm doing a MagLev mod for Space Engineers, and all the rail pieces are just linked to the same 1x1 rail piece with array and curve modifiers.
I'd accidentally kept a curve piece linked to the original, so I tried to make a single copy. Doing so reproducibly crashes Blender.

This happens on Windows 7, 64-bit, 2.77, 2.78 and November 1 Nightly. I used an addon for Space Engineers modding, but the issue happens when it's disabled as well.

Steps to reproduce:

  • Open attached (minimal) Blender file
    HoverRailCrashing.blend2 MBDownload
    .
  • On the tool panel on the right, click [2] to make a single-user copy. Blender crashes with Error: EXCEPTION_ACCESS_VIOLATION.

Interestingly, the crash does not happen if you delete the collision geometry on layer 2 first.

Revisions and Commits

rB Blender
rBf0ac661aa836 Fix T49905: Segfault when copying object data of linked object.

Event Timeline

FeepingCreature (FeepingCreature) created this task.Nov 1 2016, 11:00 PM
FeepingCreature (FeepingCreature) added a comment.Nov 2 2016, 3:52 PM

Hit another crash. I suspect it's the same one. This one happens because I have the materials linked to object instead of data? Same steps to reproduce, click [2] on the right and it crashes.

File:

HoverRailCrashing2.blend1 MBDownload

Bastien Montagne (mont29) claimed this task.Nov 4 2016, 9:55 AM
Bastien Montagne (mont29) lowered the priority of this task from 90 to 50.
Bastien Montagne (mont29) added a subscriber: Bastien Montagne (mont29).

Yep, both cases have same cause, fix incoming.

Bastien Montagne (mont29) changed the task status from Unknown Status to Resolved by committing rBf0ac661aa836: Fix T49905: Segfault when copying object data of linked object..Nov 4 2016, 9:57 AM
Bastien Montagne (mont29) added a commit: rBf0ac661aa836: Fix T49905: Segfault when copying object data of linked object..