Crash on Python console autocompletion #32692

New Issue

Artyom Lebedev · 2012-09-29T11:06:29+02:00

Artyom Lebedev commented

2012-09-29 11:06:29 +02:00

%%%Crash sometimes occurs when using Python console autocompletion. I did not managed to find exact reproduction scenarios, crashes occur spontaneously. Hope fault location will help:
blender[3648] general protection ip:1070205 sp:7fffdae10930 error:0 in blender[400000+3a26000]
System info file and loaded model file attached.%%%

%%%Crash sometimes occurs when using Python console autocompletion. I did not managed to find exact reproduction scenarios, crashes occur spontaneously. Hope fault location will help: blender[3648] general protection ip:1070205 sp:7fffdae10930 error:0 in blender[400000+3a26000] System info file and loaded model file attached.%%%

Artyom Lebedev commented

2012-09-29 11:06:29 +02:00

Changed status to: 'Open'

Campbell Barton commented

2012-09-29 14:24:40 +02:00

%%%This is not enough info to redo the crash.

You need to give steps to redo the crash, even if it happens only one in 10 times, the steps you go through to get the crash to happen are really important.

marking as incomplete.%%%

%%%This is not enough info to redo the crash. You need to give steps to redo the crash, even if it happens only one in 10 times, the steps you go through to get the crash to happen are really important. marking as incomplete.%%%

CodeManX commented

2012-10-01 12:52:23 +02:00

%%%i can confirm (random?) crashes on auto-complete, but not provide any steps to reproduce it either.

IIRC, it happened for me when auto-completing variable attributes, and the variable was a ref to blender data, like:

var = bpy.context.object

do stuff here

var.<strg+spacebar> CRASH

the problem might have to do with a context, that changes over time, and accessing attributes might try to read from invalid memory address - but it's just a wild guess%%%

%%%i can confirm (random?) crashes on auto-complete, but not provide any steps to reproduce it either. IIRC, it happened for me when auto-completing variable attributes, and the variable was a ref to blender data, like: var = bpy.context.object # do stuff here var.<strg+spacebar> CRASH the problem might have to do with a context, that changes over time, and accessing attributes might try to read from invalid memory address - but it's just a wild guess%%%

Campbell Barton commented

2012-10-02 04:42:43 +02:00

%%%This is likely invalid memory access: see
http://www.blender.org/documentation/blender_python_api_2_63_release/info_gotcha.html#edit-mode-memory-access

there is a cmake build time option that checks for this but slows down blender/python execution too. - WITH_PYTHON_SAFETY

closing. can re-open if you find steps to redo which are not accessing freed data (which is known limitation)%%%

%%%This is likely invalid memory access: see http://www.blender.org/documentation/blender_python_api_2_63_release/info_gotcha.html#edit-mode-memory-access there is a cmake build time option that checks for this but slows down blender/python execution too. - WITH_PYTHON_SAFETY closing. can re-open if you find steps to redo which are not accessing freed data (which is known limitation)%%%

Campbell Barton commented

2012-10-02 04:42:44 +02:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2012-10-02 04:42:44 +02:00

CodeManX commented

2012-10-02 14:04:35 +02:00

%%%pretty sure it's invalid memory access:

Edit mode:

p=bpy.context.object.data.polygons[0]
p

bpy.data.meshes['Cube'].polygons[0]

Object mode

p

bpy.data.meshes['Cube'].polygons[-292049]

auto-completing p does crash blender, as the reference is bad. So we just need to be careful with vars which refer to geometry and have been assigned in edit mode.%%%

%%%pretty sure it's invalid memory access: Edit mode: >>> p=bpy.context.object.data.polygons[0] >>> p bpy.data.meshes['Cube'].polygons[0] Object mode >>> p bpy.data.meshes['Cube'].polygons[-292049] auto-completing p does crash blender, as the reference is bad. So we just need to be careful with vars which refer to geometry and have been assigned in edit mode.%%%

Giuseppe De Marco commented

2015-02-09 18:50:24 +01:00

Added subscriber: @demarcog83

Giuseppe De Marco commented

2015-02-09 18:50:24 +01:00

Try this solution
https://developer.blender.org/T43491

Try this solution https://developer.blender.org/T43491

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Crash on Python console autocompletion #32692

do stuff here