Undo-related crash with custom Python operator #69711

New Issue

Demeter Dzadik · 2019-09-10T12:53:26+02:00

Demeter Dzadik commented

2019-09-10 12:53:26 +02:00

System Information
Operating system: Linux-5.0.0-21-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.34

Blender Version
Broken: version: 2.81 (sub 10), branch: master, commit date: 2019-09-09 20:20, hash: 3e81c1c1d5

Short description of error
I have a custom python operator to help me switch in and out of weight paint mode. The operator works fine most of the time. I tried to strip the operator down to the exact line that caused the crash but I couldn't pinpoint it, so I left the whole thing in, it's only 50 lines. Both of the attached files should register a "Toggle Weight Paint Mode" operator when opened.

Exact steps for others to reproduce the error

In this file:
will_it_crash.blend
Make some brush strokes (other undo-able operations are probably fine too)
Undo them all
Search for and run "Toggle Weight Paint Mode" operator. If didn't crash, run it a few times.
If it's not crashed, undo everything and try again. I can get it to crash after at most 3 tries.

It seems to be easier to reproduce in heavier files, so if you can't reproduce in that simple file, please try this:
pythoncrash_fullchar.blend

Here's a stack trace:
pythoncrash.txt

**System Information** Operating system: Linux-5.0.0-21-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.34 **Blender Version** Broken: version: 2.81 (sub 10), branch: master, commit date: 2019-09-09 20:20, hash: 3e81c1c1d5 **Short description of error** I have a custom python operator to help me switch in and out of weight paint mode. The operator works fine most of the time. I tried to strip the operator down to the exact line that caused the crash but I couldn't pinpoint it, so I left the whole thing in, it's only 50 lines. Both of the attached files should register a "Toggle Weight Paint Mode" operator when opened. **Exact steps for others to reproduce the error** - In this file: [will_it_crash.blend](https://archive.blender.org/developer/F7730455/will_it_crash.blend) - Make some brush strokes (other undo-able operations are probably fine too) - Undo them all - Search for and run "Toggle Weight Paint Mode" operator. If didn't crash, run it a few times. - If it's not crashed, undo everything and try again. I can get it to crash after at most 3 tries. It seems to be easier to reproduce in heavier files, so if you can't reproduce in that simple file, please try this: [pythoncrash_fullchar.blend](https://archive.blender.org/developer/F7730570/pythoncrash_fullchar.blend) Here's a stack trace: [pythoncrash.txt](https://archive.blender.org/developer/F7730461/pythoncrash.txt)

Demeter Dzadik commented

2019-09-10 12:53:26 +02:00

Added subscriber: @Mets

Richard Antalik commented

2020-01-10 21:21:36 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-01-10 21:21:36 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2020-01-10 21:21:36 +01:00

@Mets Got no crash related to what's described in report.

However your second bigger file crashed on attempt to paint, but stacktrace seem irrelevant to report subject.

Can you give us different file to test this on? Note that this may not be treated as bug necessarily if your script is trying to do something we do not support.

@Mets Got no crash related to what's described in report. However your second bigger file crashed on attempt to paint, but stacktrace seem irrelevant to report subject. Can you give us different file to test this on? Note that this may not be treated as bug necessarily if your script is trying to do something we do not support.

Richard Antalik commented

2020-01-19 23:43:07 +01:00

Changed status from 'Needs User Info' to: 'Archived'

Richard Antalik closed this issue

2020-01-19 23:43:07 +01:00

Richard Antalik self-assigned this 2020-01-19 23:43:07 +01:00

Richard Antalik commented

2020-01-19 23:43:07 +01:00

Since last asking for information it has been 7 or more days, due to the policy of our bug tracker we will have to close the report

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

Undo-related crash with custom Python operator #69711