QuadRemesher plugin crashes Blender 2.83 and 2.9 on Windows (in python code that hides and import a fbx) #77046

New Issue

MaximeRouca · 2020-05-25T09:17:55+02:00

MaximeRouca commented

2020-05-25 09:17:55 +02:00

System Information
Operating system: windows
Graphics card: nvidia

Blender Version
Broken: 2.83 and 2.90
Worked: 2.82a

Short description of error
Hello,
I'm the developer of QuadRemesher (an automatic quad remeshing addon for Blender).
My addon (v1.0) is working well in 2.82 but crashes blender 2.83 and 2.9.
I found a workaround (in QR 1.1 CR3) but I think the crash needs to be fixed inside Blender to improve Blender stability.

My addon basically works like this: when you press "Remesh It", it:

exports the selected mesh in a fbx file (inputFile)
launches en executable which reads the inputFile, computes the quad remeshing, export the resulting quad-based mesh in a fbx file : retopoFile.
hides the selected objects and imports the retopoFile in the scene

This is crashing Blender 2.83 and 2.90 in the 3rd step (hide and import)
The workaround is just to switch the order of "hiding" and "importing" operations.
So in 1.1 CR3 I do : "imports" the retopoFile and then "hides the previously selected object".
With this order, Blender 2.83 / 2.90 is not crashing anymore.

Exact steps for others to reproduce the error
You will have to download and install my plugin : https://exoside.com/quadremesher/quadremesher-download/
(use the 1.0 if you want to reproduce the crash)
Once installed (see https://youtu.be/6BvP3rXeRRI),
you just need to click on "Remesh It" button with the "starting" Cube selected
The issue is in function doRemeshing_Finish (see "hide_set" and "import_mesh_fbx" calls)

**System Information** Operating system: windows Graphics card: nvidia **Blender Version** Broken: 2.83 and 2.90 Worked: 2.82a **Short description of error** Hello, I'm the developer of QuadRemesher (an automatic quad remeshing addon for Blender). My addon (v1.0) is working well in 2.82 but crashes blender 2.83 and 2.9. I found a workaround (in QR 1.1 CR3) but I think the crash needs to be fixed inside Blender to improve Blender stability. My addon basically works like this: when you press "Remesh It", it: - exports the selected mesh in a fbx file (inputFile) - launches en executable which reads the inputFile, computes the quad remeshing, export the resulting quad-based mesh in a fbx file : retopoFile. - hides the selected objects and imports the retopoFile in the scene This is crashing Blender 2.83 and 2.90 in the 3rd step (hide and import) The workaround is just to switch the order of "hiding" and "importing" operations. So in 1.1 CR3 I do : "imports" the retopoFile and then "hides the previously selected object". With this order, Blender 2.83 / 2.90 is not crashing anymore. **Exact steps for others to reproduce the error** You will have to download and install my plugin : https://exoside.com/quadremesher/quadremesher-download/ (use the 1.0 if you want to reproduce the crash) Once installed (see https://youtu.be/6BvP3rXeRRI), you just need to click on "Remesh It" button with the "starting" Cube selected The issue is in function doRemeshing_Finish (see "hide_set" and "import_mesh_fbx" calls)

MaximeRouca commented

2020-05-25 09:17:55 +02:00

Added subscriber: @Max33

Philipp Oeser commented

2020-05-25 10:32:26 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-05-25 10:32:26 +02:00

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

Philipp Oeser commented

2020-05-25 10:32:26 +02:00

Can this be reproduced with a simpler setup? (I assume this is not depending on the export as well as the remeshing at all?)

So something like this:

provide a blend file (share here -- also the fbx that will be imported) with
a minimal script that imports a simple fbx first, then hides --> no crash
a minimal script that hides first then imports a simple fbx --> crash

This will help reduce the time reproducing and tracking down the issue, thx in advance!

Can this be reproduced with a simpler setup? (I assume this is not depending on the export as well as the remeshing at all?) So something like this: - provide a blend file (share here -- also the fbx that will be imported) with - a minimal script that imports a simple fbx first, then hides --> no crash - a minimal script that hides first then imports a simple fbx --> crash This will help reduce the time reproducing and tracking down the issue, thx in advance!

MaximeRouca commented

2020-05-25 15:10:51 +02:00

OK.

Here is a simple script that crashes Blender 2.83 and 2.90:
I call this function in the execute() function of an operator.
Just call it with the cube which is created when Blender starts.

def test_crash():
sel_objects = bpy.context.selected_objects
if len(sel_objects) != 1:
return
input_obj = sel_objects[0]

# 1 - export
myfilepath = "C:/Users/Public/testcrash.fbx"
bpy.ops.export_scene.fbx(filepath=myfilepath, use_selection=True)

# 2 - hide
input_obj.hide_set(state=True)

# 3 - import
bpy.ops.import_scene.fbx(filepath=myfilepath)

And this one works:
def working_case():
sel_objects = bpy.context.selected_objects
if len(sel_objects) != 1:
return
input_obj = sel_objects[0]

# 1 - export
myfilepath = "C:/Users/Public/testcrash.fbx"
bpy.ops.export_scene.fbx(filepath=myfilepath, use_selection=True)

# 3 - import
bpy.ops.import_scene.fbx(filepath=myfilepath)

# 2 - hide
input_obj.hide_set(state=True)

OK. Here is a simple script that crashes Blender 2.83 and 2.90: I call this function in the execute() function of an operator. Just call it with the cube which is created when Blender starts. def test_crash(): sel_objects = bpy.context.selected_objects if len(sel_objects) != 1: return input_obj = sel_objects[0] # 1 - export myfilepath = "C:/Users/Public/testcrash.fbx" bpy.ops.export_scene.fbx(filepath=myfilepath, use_selection=True) # 2 - hide input_obj.hide_set(state=True) # 3 - import bpy.ops.import_scene.fbx(filepath=myfilepath) And this one works: def working_case(): sel_objects = bpy.context.selected_objects if len(sel_objects) != 1: return input_obj = sel_objects[0] # 1 - export myfilepath = "C:/Users/Public/testcrash.fbx" bpy.ops.export_scene.fbx(filepath=myfilepath, use_selection=True) # 3 - import bpy.ops.import_scene.fbx(filepath=myfilepath) # 2 - hide input_obj.hide_set(state=True)

Emir Sinan Gürlek commented

2020-05-25 23:08:46 +02:00

Added subscriber: @filibis

Philipp Oeser commented

2020-05-26 11:00:22 +02:00

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

Philipp Oeser commented

2020-05-26 12:23:32 +02:00

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

Philipp Oeser commented

2020-05-26 12:23:32 +02:00

Cannot reproduce here.
Checked in both 2.83 and 2.90 buildbot builds with this file:
#77046.blend

Just to be really sure: does it crash with the file above for you?

Cannot reproduce here. Checked in both 2.83 and 2.90 buildbot builds with this file: [#77046.blend](https://archive.blender.org/developer/F8555389/T77046.blend) Just to be really sure: does it crash with the file above for you?

MaximeRouca commented

2020-05-28 18:52:55 +02:00

Yes it works if you run it outside of an operator.
But, as described in my previous message, it crashes when launched inside an operator execute() method. (at least on my computer with 2.83 and 2.90)
I attached an addon which allows to reproduce the crash.
(put it in the scripts/addons folder, enable it in the Prefs / Addons, hit 'N', open the QRTestCrash tab, click on <>)quad_remesher_crash.zip

Yes it works if you run it outside of an operator. But, as described in my previous message, it crashes when launched inside an operator execute() method. (at least on my computer with 2.83 and 2.90) I attached an addon which allows to reproduce the crash. (put it in the scripts/addons folder, enable it in the Prefs / Addons, hit 'N', open the QRTestCrash tab, click on <<Remesh It>>)[quad_remesher_crash.zip](https://archive.blender.org/developer/F8560511/quad_remesher_crash.zip)

Philipp Oeser commented

2020-05-29 14:09:37 +02:00

Also no crash here with the Addon you provided.
(I had to change myfilepath in the script to something writable on linux, but no, no crash here)

Do you have the chance to test this on another machine?
You could also check if there are possibly other Addons interfering? File > Defaults > Load Factory Settings and only enable that one Addon?

Also no crash here with the Addon you provided. (I had to change `myfilepath` in the script to something writable on linux, but no, no crash here) Do you have the chance to test this on another machine? You could also check if there are possibly other Addons interfering? `File` > `Defaults` > `Load Factory Settings` and only enable that one Addon?

MaximeRouca commented

2020-05-29 15:58:03 +02:00

I tested on Linux. It works on my Linux.... but not on my Windows 10....
Can you test on Windows ?

I tested on Linux. It works on my Linux.... but not on my Windows 10.... Can you test on Windows ?

Campbell Barton commented

2020-06-16 05:32:34 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2020-06-16 05:32:34 +02:00

Changed status from 'Needs User Info' to: 'Needs Developer To Reproduce'

Campbell Barton commented

2020-06-16 05:32:34 +02:00

Needs developer to test on windows.

Campbell Barton changed title from ~~QuadRemesher plugin crashes Blender 2.83 and 2.9 (in python code that hides and import a fbx)~~ to QuadRemesher plugin crashes Blender 2.83 and 2.9 on Windows (in python code that hides and import a fbx)

2020-06-16 05:32:57 +02:00

Ray molenkamp commented

2020-06-16 05:52:53 +02:00

Added subscriber: @LazyDodo

Ray molenkamp commented

2020-06-16 05:52:53 +02:00

Changed status from 'Needs Developer To Reproduce' to: 'Needs User Info'

Ray molenkamp commented

2020-06-16 05:52:53 +02:00

no repro with 2.83 or 2.90 even tried the hardened heap.

Given you have the crash with 2.90, when you run it from the command line, and it crashes it should tell you the location of the crash report (generally somewhere in the temp folder) please attach this file to this report.

no repro with 2.83 or 2.90 even tried the hardened heap. Given you have the crash with 2.90, when you run it from the command line, and it crashes it should tell you the location of the crash report (generally somewhere in the temp folder) please attach this file to this report.

Campbell Barton commented

2020-06-20 05:25:25 +02:00

This report requires far too many steps to redo, please include a sample blend file that includes a script that crashes on execution.

MaximeRouca commented

2020-06-20 10:09:15 +02:00

The simple script has already been provided (see history of this conversation : May 25, 3 PM)
And (May 28 6 PM) -> you can download the zip with the code inside...

The simple script has already been provided (see history of this conversation : May 25, 3 PM) And (May 28 6 PM) -> you can download the zip with the code inside...

Philipp Oeser commented

2020-07-06 10:09:12 +02:00

In #77046#954666, @LazyDodo wrote:
no repro with 2.83 or 2.90 even tried the hardened heap.

Given you have the crash with 2.90, when you run it from the command line, and it crashes it should tell you the location of the crash report (generally somewhere in the temp folder) please attach this file to this report.

@Max33 : please the above ^^

> In #77046#954666, @LazyDodo wrote: > no repro with 2.83 or 2.90 even tried the hardened heap. > > Given you have the crash with 2.90, when you run it from the command line, and it crashes it should tell you the location of the crash report (generally somewhere in the temp folder) please attach this file to this report. @Max33 : please the above ^^

MaximeRouca commented

2020-07-10 12:53:00 +02:00

Hello the bug seems to be fixed.
I can reproduce the crash in 2.83 Beta (Date 2020-05-15)
And the crash doesn't happen with Blender 2.83.2 .

Hello the bug seems to be fixed. I can reproduce the crash in 2.83 Beta (Date 2020-05-15) And the crash doesn't happen with Blender 2.83.2 .

Campbell Barton commented

2020-07-19 10:25:56 +02:00

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

Campbell Barton closed this issue

2020-07-19 10:25:56 +02:00

Campbell Barton self-assigned this 2020-07-19 10:25:56 +02:00

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QuadRemesher plugin crashes Blender 2.83 and 2.9 on Windows (in python code that hides and import a fbx) #77046