Crash when trying to autocomplete in console on a depsgraph instance #100286

New Issue

Julien Duroure · 2022-08-08T12:01:29+02:00

Julien Duroure commented

2022-08-08 12:01:29 +02:00

System Information
Operating system: linux
Graphics card: Nvidia

Blender Version
Broken: Blender 3.3 beta, build from August 7th

Short description of error
Crash when trying to autocomplete in console

Exact steps for others to reproduce the error

Open file in attachment
Copy script from text editor and past in Console Editor. Enter to execute
In Console editor, enter instA[0].
Then press tab to get autocompletion => Crash.
See crash log in attachement

py_instance_access.blend

py_instance_access.crash.txt

system-info.txt

**System Information** Operating system: linux Graphics card: Nvidia **Blender Version** Broken: Blender 3.3 beta, build from August 7th **Short description of error** Crash when trying to autocomplete in console **Exact steps for others to reproduce the error** - Open file in attachment - Copy script from text editor and past in Console Editor. Enter to execute - In Console editor, enter instA[0]. - Then press tab to get autocompletion => Crash. - See crash log in attachement [py_instance_access.blend](https://archive.blender.org/developer/F13346064/py_instance_access.blend) [py_instance_access.crash.txt](https://archive.blender.org/developer/F13346065/py_instance_access.crash.txt) [system-info.txt](https://archive.blender.org/developer/F13346071/system-info.txt)

Julien Duroure commented

2022-08-08 12:01:29 +02:00

Added subscriber: @JulienDuroure

Philipp Oeser commented

2022-08-08 12:19:50 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-08-08 12:19:50 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Philipp Oeser commented

2022-08-08 12:19:50 +02:00

Can confirm, will check

Philipp Oeser changed title from ~~Crash when trying to autocomplete in console~~ to Crash when trying to autocomplete in console on a depsgraph instance

2022-08-08 13:47:19 +02:00

Julien Duroure commented

2022-08-09 23:22:16 +02:00

Edit: I will open a new ticket for this case

Sergey Sharybin commented

2022-08-10 15:38:51 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2022-08-10 15:38:51 +02:00

The "object_instances" accessor is a purely generator and its items can not be referenced and accessed after the iteration process is finished. Philipp mentioned it in the #100314#1402221.

This is pretty much what is happening when following the steps as they are.
The tricky part is: when doing something like depsgraph.object_instances- [x].<tab> it is way less obvious, but it is also what is going on: internally a reference to an item is stored and then auto-completeion is attempted on it.

Not sure if it is something we can easily support, but would be nice to not crash.
I've tried to use custom lookup-int on the object_instances property which always returns false. This fixes the crash but leads to a cryptic message in this case RuntimeError: bpy_prop_collection[index]: internal error, valid index 0 given in 284 sized collection, but value not found. Still much better than crash, but would be nice if the subscript was disabled on the proeprty in a way that doesn't throw cryptic exception.

The "object_instances" accessor is a purely generator and its items can not be referenced and accessed after the iteration process is finished. Philipp mentioned it in the #100314#1402221. This is pretty much what is happening when following the steps as they are. The tricky part is: when doing something like `depsgraph.object_instances- [x].<tab>` it is way less obvious, but it is also what is going on: internally a reference to an item is stored and then auto-completeion is attempted on it. Not sure if it is something we can easily support, but would be nice to not crash. I've tried to use custom lookup-int on the `object_instances` property which always returns `false`. This fixes the crash but leads to a cryptic message in this case `RuntimeError: bpy_prop_collection[index]: internal error, valid index 0 given in 284 sized collection, but value not found`. Still much better than crash, but would be nice if the subscript was disabled on the proeprty in a way that doesn't throw cryptic exception.

blender-admin commented

2022-08-23 14:56:54 +02:00

This issue was referenced by 21ea499558

This issue was referenced by 21ea4995585931ad54f51c1878c06c526c3355a5

Campbell Barton commented

2022-08-23 15:05:24 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Campbell Barton closed this issue

2022-08-23 15:05:24 +02:00

Campbell Barton self-assigned this 2022-08-23 15:05:24 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Crash when trying to autocomplete in console on a depsgraph instance #100286