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Maniphest T41125

crash in specific situation with python context override
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Description

System Information
tested on laptop and workstation (fedora20/intel graphics, fedora20/nvidia780)

Blender Version
Broken: Blender 2.71 (sub 1), Commit date: 2014-07-14 11:34, Hash 8a04bed
Worked: never? (tried builds back to 2.65)

Short description of error
getting a crash when overriding context 'area' in concert with closing regions via operators AND taking a screenshot via operator (quite specific situation, I know, but I guess this could come up elsewhere, too)

Exact steps for others to reproduce the error

  • open attached .blend
  • execute script from TextEditor
  • also some more information in the TextEditor (including patch to prevent crash [but not real fix])

Event Timeline

Philipp Oeser (lichtwerk) created this task.Jul 19 2014, 2:06 PM
Philipp Oeser (lichtwerk) raised the priority of this task from to 90.
Philipp Oeser (lichtwerk) updated the task description. (Show Details)
Philipp Oeser (lichtwerk) added projects: BF Blender, Add-ons (BF-Blender).
Philipp Oeser (lichtwerk) edited a custom field.
Philipp Oeser (lichtwerk) attached 1 file(s): F98513: ContextOverrideCrash.blend.
Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).
Campbell Barton (campbellbarton) lowered the priority of this task from 90 to 50.Jul 20 2014, 8:24 AM
Sergey Sharybin (sergey) assigned this task to Campbell Barton (campbellbarton).Jul 21 2014, 11:50 AM
Sergey Sharybin (sergey) added subscribers: Campbell Barton (campbellbarton), Sergey Sharybin (sergey).

@Campbell Barton (campbellbarton), it'll be up to use to verify fixes anyway.

Campbell Barton (campbellbarton) added a comment.Aug 19 2014, 11:37 AM

note, I tried to redo this but couldn't get a crash, something strange is going on with the context though.

Dalai Felinto (dfelinto) added a subscriber: Dalai Felinto (dfelinto).Aug 27 2014, 1:57 PM

@Campbell Barton (campbellbarton) did you try to run the script without changing the 'editors'? The crash will only happen if you see some 3D Viewport. The complete backtrace is: P130

Sebastian Röthlisberger (bashi) added a subscriber: Sebastian Röthlisberger (bashi).Sep 2 2014, 9:19 AM
Campbell Barton (campbellbarton) changed the task status from Unknown Status to Archived.Sep 3 2014, 12:39 PM

The problem is your setting the area but leaving the text editor region set.

You can use a script like this to get the view3d area & region.

def view3d_find():
    # returns first 3d view, normally we get from context
    for area in bpy.context.window.screen.areas:
        if area.type == 'VIEW_3D':
            v3d = area.spaces[0]
            rv3d = v3d.region_3d
            for region in area.regions:
                if region.type == 'WINDOW':
                    return area, region, rv3d
    return None, None, None
Philipp Oeser (lichtwerk) added a comment.Sep 3 2014, 2:19 PM

Thanx alot for investigating this! Makes total sense now :$