crash on selecting tapered and bevelled bezier curve
Closed, ArchivedPublic


System Information
Windows 8.1 x64 on Intel i3-4000M at 2.4GHz, 8GB RAM
NVIDIA GeForce 820M

Blender Version
Broken: 2.79 5bd8c9 (2017-09-11 10:43) from splash Screen
Also broken: 2.71 on another computer
Worked: (unknown)

Short description of error
blender dissapears/crashes without any message

Exact steps for others to reproduce the error
-open the attached file

(created with 2.79)
-exit edit mode
-select "BezierCurve" by clicking on it (selecting it in the outliner does not Crash)



Works fine for me in 611712fcc89100c4f0084d0d4c6b9392367c4c64 and 2.79 release.

ronan ducluzeau (zeauro) triaged this task as Incomplete priority.Tue, Feb 13, 7:42 PM

No crash, here.

Please, launch Blender from the command line with -d option, provoke the crash and attach as text file here any error printed out in the console (do not paste it directly in comment).

A link that can help , in case you have no idea how to launch Blender from command line.

Thank you for taking me serious. On my machine it is 100% reproducible.

After reading this log I turned off archimesh and the missing 'object_add_chain' (found in testing), saved my user settings and quit blender.
I was wondering about the two "Toggle Editmode" lines, but the first one belongs to opening the Euphonium_001.blend file.
Having restarted it with the -d option, here is the new log:
(just the expected two lines missing)
I just found out that the crash occurs on the first selection after opening the file and with viewport_shade set to wireframe or rendered.
Selecting "BezierCurve" in bounding box mode works, but selecting something else, changing to one of wireframe or rendered and select it again will crash.
After having successfully selected "BezierCurve" in one of the other modes blender will not crash even with viewport_shade set to wireframe or rendered.

two hours later:
After having discovered the command line switch to disable the crash handler, I was able to gather the following information:

looks like a crash in your opengl driver, try

  1. Upgrading your video drivers
  2. A different selection mode in the preferences panel -> System tab.

to 1) seems to be the actual version (at least Windows says so)
to 2) YES!!
It either (and both at the same time too) helps to

  • check "OpenGL Depth Picking" or
  • select "OpenGL Occlusion Queries".

When the default values ("Automatic" and not checked) are restored the crash reoccurs.
Perhaps the heading Selection could be changed into Object Selection (Mode/Method)?

"Works fine for me", thank you! (Is it up to me to mark this task resolved?)

I tried to check wether this helps on the other computer, but in 2.71 I haven't found the selection mode.
But the workaround with the viewport_shade setting does work there (other brand).
If someone needs more information to enhance the "Automatic" selection, feel free to ask!

Glad to hear that the problem is solved:)

Closing as archived.

If the problem show up again, you can post a comment on this task, so it can be reopened.