Python API: Access Violation crash running operator from a timer #65917

New Issue

eldee smith · 2019-06-19T04:06:02+02:00

eldee smith commented

2019-06-19 04:06:02 +02:00

timer_crash.py
blender.crash.txt
System Information
Operating system: Linux-4.18.0-21-generic-x86_64-with-debian-buster-sid 64 Bits (Verified crashing on Windows 10 as well)
Graphics card: Mesa DRI Intel(R) Haswell Mobile Intel Open Source Technology Center 4.5 (Core Profile) Mesa 18.2.8

Blender Version
Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-18 22:21, hash: fc182e3189
Worked: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-03 19:00, hash: d62a749fcf

Short description of error
Blender crashes to desktop when an operator is called from a timer- ONLY on the second time the timer fires! This was not happening a couple of weeks ago (see last working version, I still have that build and the supplied script does not cause a crash)

Exact steps for others to reproduce the error
Run the attached python script. The first time the timer is triggered, it will work correctly- the second time it is triggered (10 seconds later) {F7268889}Blender will crash to desktop.

Edit: script and crash log attached for your convenience

import bpy

def main(context):
    print("Crash will occur on the second timer trigger")

class SimpleOperator(bpy.types.Operator):
    """Tooltip"""
    bl_idname = "object.simple_operator"
    bl_label = "Simple Object Operator"

    def execute(self, context):
        main(context)
        return {'FINISHED'}

def test():    
    bpy.ops.object.simple_operator()
    return 10.0

def register():
    bpy.utils.register_class(SimpleOperator)
    bpy.app.timers.register(test)

def unregister():
    bpy.utils.unregister_class(SimpleOperator)
    bpy.app.timers.unregister(test)

if __name__ == "__main__":
    register()

[timer_crash.py](https://archive.blender.org/developer/F7268846/timer_crash.py) [blender.crash.txt](https://archive.blender.org/developer/F7268991/blender.crash.txt) **System Information** Operating system: Linux-4.18.0-21-generic-x86_64-with-debian-buster-sid 64 Bits (Verified crashing on Windows 10 as well) Graphics card: Mesa DRI Intel(R) Haswell Mobile Intel Open Source Technology Center 4.5 (Core Profile) Mesa 18.2.8 **Blender Version** Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-18 22:21, hash: `fc182e3189` Worked: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-03 19:00, hash: `d62a749fcf` **Short description of error** Blender crashes to desktop when an operator is called from a timer- ONLY on the second time the timer fires! This was not happening a couple of weeks ago (see last working version, I still have that build and the supplied script does not cause a crash) **Exact steps for others to reproduce the error** Run the attached python script. The first time the timer is triggered, it will work correctly- the second time it is triggered (10 seconds later) {[F7268889](https://archive.blender.org/developer/F7268889/blender.crash.txt)}Blender will crash to desktop. Edit: script and crash log attached for your convenience ``` import bpy def main(context): print("Crash will occur on the second timer trigger") class SimpleOperator(bpy.types.Operator): """Tooltip""" bl_idname = "object.simple_operator" bl_label = "Simple Object Operator" def execute(self, context): main(context) return {'FINISHED'} def test(): bpy.ops.object.simple_operator() return 10.0 def register(): bpy.utils.register_class(SimpleOperator) bpy.app.timers.register(test) def unregister(): bpy.utils.unregister_class(SimpleOperator) bpy.app.timers.unregister(test) if __name__ == "__main__": register() ```

eldee smith commented

2019-06-19 04:06:02 +02:00

Added subscriber: @testure

notallowed commented

2019-06-19 10:38:10 +02:00

Added subscriber: @simon_lusenc

Andrew Peel commented

2019-06-19 18:14:22 +02:00

Added subscriber: @AndrewPeel

Jose Conseco commented

2019-06-21 10:13:38 +02:00

Added subscriber: @JoseConseco

Jose Conseco commented

2019-06-21 10:14:31 +02:00

I had similar problem. Week or two ago, calling operator from timer worked ok, now crahs.

Sebastian Parborg commented

2019-06-21 11:38:02 +02:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-06-21 11:38:02 +02:00

Changed status from 'Open' to: 'Resolved'

Sebastian Parborg closed this issue

2019-06-21 11:38:02 +02:00

Sebastian Parborg self-assigned this 2019-06-21 11:38:02 +02:00

Sebastian Parborg commented

2019-06-21 11:38:02 +02:00

There was an issue recently solved related to timers. I can't reproduce the crash so I'm guessing it solved this also.
If this is not the case for you, let me know and we'll reopen this.

There was an issue recently solved related to timers. I can't reproduce the crash so I'm guessing it solved this also. If this is not the case for you, let me know and we'll reopen this.

eldee smith commented

2019-06-21 18:41:27 +02:00

This is still happening in the latest 2.80 build available on buildbot: version: 2.80 (sub 74), branch: master, commit date: 2019-06-19 18:29, hash: d30f72dfd8

Were you trying to repro with a locally built blender? Should I try to confirm repro on a different version?

This is still happening in the latest 2.80 build available on buildbot: version: 2.80 (sub 74), branch: master, commit date: 2019-06-19 18:29, hash: `d30f72dfd8` Were you trying to repro with a locally built blender? Should I try to confirm repro on a different version?

Andrew Peel commented

2019-06-21 18:47:00 +02:00

I just updated and compiled and everything is working on my side.

eldee smith commented

2019-06-21 19:07:44 +02:00

Ah, okay- the fix probably hasn't made its way over to the nightly builds yet. I'll check it again tomorrow.

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

Python API: Access Violation crash running operator from a timer #65917