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Maniphest T48012

Knife Project Crashes Blender
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Description

System Information
Windows 7 x64 GTX580

Blender Version
Broken: 2.77 b0a7e77
Worked: 2.75 7ae44e8

Short description of error
Knife project in some cases crashes blender

Exact steps for others to reproduce the error

  1. open attached blend file
  2. knife project
  3. notice crash

crash.blend738 KBDownload

Revisions and Commits

rB Blender
rB83b5f0268ef7 Fix T48012: Knife Project crash

Event Timeline

Carlo Andreacchio (candreacchio) created this task.Mar 31 2016, 12:29 AM
Carlo Andreacchio (candreacchio) raised the priority of this task from to 90.
Carlo Andreacchio (candreacchio) updated the task description. (Show Details)
Carlo Andreacchio (candreacchio) added a project: BF Blender.
Carlo Andreacchio (candreacchio) edited a custom field.
Carlo Andreacchio (candreacchio) added a subscriber: Carlo Andreacchio (candreacchio).
perfection cat (sindra1961) added a subscriber: perfection cat (sindra1961).Mar 31 2016, 2:47 AM

I can not reproduce this here.

Windows 10 Pro 64bits

Carlo Andreacchio (candreacchio) added a comment.Mar 31 2016, 2:50 AM

Changing the camera view makes it work... leaving it zoomed in crashes it on my computer.

Did you follow the steps exactly or did you orbit / zoom before knife projecting?

perfection cat (sindra1961) added a comment.Mar 31 2016, 3:04 AM

No, I do not change camera view.
I changed view to show a result and took a snapshot.

Carlo Andreacchio (candreacchio) added a comment.Mar 31 2016, 3:05 AM

interesting.....

I am going to try on different drivers and see if that makes a difference

Carlo Andreacchio (candreacchio) added a comment.Mar 31 2016, 3:08 AM

Hmmm....

Drivers 364.51 crashes with a gtx580
Drivers 332.21 doesnt crash with a gtx590 (different computer, pretty similar setup)

Germano Cavalcante (mano-wii) added a subscriber: Germano Cavalcante (mano-wii).Mar 31 2016, 3:39 AM

I could reproduce the bug.
It seems that the problem is in function bmesh_disk_facevert_count.
Within it, the bmesh_disk_edge_next(e_iter, v) is returning NULL when it should not.
Now just need to know why.

Campbell Barton (campbellbarton) claimed this task.Mar 31 2016, 7:04 AM
Campbell Barton (campbellbarton) lowered the priority of this task from 90 to 50.
Campbell Barton (campbellbarton) added a project: BF Blender: Regressions.

Will look into this tomorrow (should be fixed for 2.77a)

Campbell Barton (campbellbarton) changed the task status from Unknown Status to Resolved by committing rB83b5f0268ef7: Fix T48012: Knife Project crash.Mar 31 2016, 9:24 PM
Campbell Barton (campbellbarton) added a commit: rB83b5f0268ef7: Fix T48012: Knife Project crash.