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Maniphest T52694

Frequent crashes when toggling edit mode with subsurf
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Description

System Information
Ubuntu 16.04 LTS/ GTX 1070 8GB

system-info.txt27 KBDownload

Blender Version
2.79RC2 7b397cdfc81,
Worked: (optional)

Short description of error
Quite often when modelling an object with subsurf active, Blender will crash when toggling edit/ object mode. As I am not sure of a reliable way to reproduce on another system, I have attached a few recent crash reports generated by Blender running under RC2.

Exact steps for others to reproduce the error
Not sure how to most reliably reproduce, on my system crashes are fairly random, but seem to come from subsurf modelling and trigger by toggling edit/ object mode.

One such file that has crashed is attached, hopefully it can be of some help.

blender_crashes.tar.gz11 KBDownload

lure_print-2.blend1 MBDownload

Related Objects

Event Timeline

Tim Roberts (Timaroberts) created this task.Sep 10 2017, 2:57 AM
0rAngE (undo) added a subscriber: 0rAngE (undo).Sep 10 2017, 5:18 PM

I can confirm this.
I use blender as much as the pipeline (max+vray) permits in production on a daily basis.
This and the SelectShortestPath bug (that I have just reported) are the biggest stoppers for me to start using 2.79

Nahuel Belich (belich) added a subscriber: Nahuel Belich (belich).Sep 10 2017, 8:53 PM
Bastien Montagne (mont29) lowered the priority of this task from 90 to 30.Sep 11 2017, 9:12 AM
Bastien Montagne (mont29) added a subscriber: Bastien Montagne (mont29).

Pretty sure this has been fixed already, cannot replicate in current master nor in current 2.79 branch, to which a serious modifiers-related crasher was backported after 2.79 RC2 was published.

Can you please try the latest build from our buildbot?

0rAngE (undo) added a comment.Sep 12 2017, 2:58 AM

@Bastien Montagne (mont29)

Tested today with the latest buildbot, and haven't had a single crash.

Bastien Montagne (mont29) changed the task status from Unknown Status to Resolved.Sep 12 2017, 7:34 AM
Bastien Montagne (mont29) claimed this task.

Thanks, fix shall also be in 2.79 released today, so we can consider this as fixed I think. :)

Tim Roberts (Timaroberts) added a comment.Sep 25 2017, 11:20 PM

Hi, @Bastien Montagne (mont29) , unfortunately, this issue seems to persist (although not as often as previously) in release as well as in dc86b7a (own build from master).

I have attached both the currently affected .blend file and crash.txt from both builds. I will continue testing further, but thought perhaps should mention that this is still occurring.

new_car.blend755 KBDownload

new_car.crash_from-dc86b7a.txt16 KBDownload

new_car.crash_from-5bd8ac9abfa.txt19 KBDownload

Germano Cavalcante (mano-wii) added a subscriber: Germano Cavalcante (mano-wii).Sep 26 2017, 3:28 AM

Even holding the tab button for a few seconds, I could not replicate the bug.

But, if it helps the developers, I made a patch that proposes to fix definitively all the problems involving Subsurf + Shrinkwrap:

safe_recalclooptris.diff9 KBDownload