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Crash : attempting to reset a a custom property that has a string value crashes Blender
Closed, ResolvedPublic


System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.70

Blender Version
Broken: version: 2.81 (sub 3), branch: master, commit date: 2019-08-20 22:35, hash: rBdaba3e871ff5
Worked: (Possibly never it crashes 2.79 too)

Short description of error
If right click on a custom property that has a string value you will get a "Reset to Default Value" option.... selecting it crashes Blender

Exact steps for others to reproduce the error
I've uploaded a simple file, the cube has a custom property... reset it to default value.

Event Timeline

Can confirm bug:

Have no idea, is there is why to check logs/error?

Jeroen Bakker (jbakker) lowered the priority of this task from 90 to High.EditedAug 30 2019, 4:35 PM
# Blender 2.81 (sub 4), Unknown revision

# backtrace
b281(BLI_system_backtrace+0x35) [0x5651dd105118]
b281(+0x2bdcd5f) [0x5651dcd5ed5f]
b281(+0x2bdcf3e) [0x5651dcd5ef3e]
/lib/x86_64-linux-gnu/ [0x7f3793c5ff20]
/lib/x86_64-linux-gnu/ [0x7f3793cd2646]
b281(RNA_property_string_default_length+0x8b) [0x5651dd212d5f]
b281(RNA_property_string_get_default_alloc+0x8a) [0x5651dd212c7c]
b281(RNA_property_reset+0x385) [0x5651dd21ec11]
b281(+0x39fc82c) [0x5651ddb7e82c]
b281(+0x329b014) [0x5651dd41d014]
b281(+0x329b81c) [0x5651dd41d81c]
b281(WM_operator_name_call_ptr+0xb0) [0x5651dd41d8d9]
b281(+0x39ca6b6) [0x5651ddb4c6b6]
b281(+0x39e3cbe) [0x5651ddb65cbe]
b281(+0x3298b7b) [0x5651dd41ab7b]
b281(+0x329df91) [0x5651dd41ff91]
b281(+0x329ed66) [0x5651dd420d66]
b281(wm_event_do_handlers+0x7ec) [0x5651dd421ffa]
b281(WM_main+0x30) [0x5651dd414e77]
b281(+0x2bd8624) [0x5651dcd5a624]
/lib/x86_64-linux-gnu/ [0x7f3793c42b97]
b281(_start+0x2a) [0x5651dcd5a0aa]
  • does not happen when the property was just created. Could be related to saving/loading.

I am see it happening in the file, but I am not able to reproduce it from scratch. Do you know the steps that were taken in order you got the file in this state that crashes?

Jeroen Bakker (jbakker) lowered the priority of this task from High to 30.Aug 30 2019, 4:49 PM

I literally just create a custom property then try reset it to default.... I'll try get another user to confirm...

This is in a fresh blend...

Philipp Oeser (lichtwerk) raised the priority of this task from 30 to 50.Sep 2 2019, 11:59 AM

Can confirm this, too.
Not sure why I am not getting it all the time (sometimes I have to try twice), but on second try, it always fails.
With a debugger attached, it seems to always fail.

Note this was once reported before T54899: Custom property -> revert to default value crashes blender, I wasnt able to reproduce for a while later, so closed it, but seems to be back (or never fixed...)

@Alexander Gavrilov (angavrilov) : you did rB61c941f040d3: RNA: support setting default values for custom properties., mind checking if P669 is safe enough?

I can even reproduce this in 2.69... it's a fairly consistent bug ;)

....even the removal of the ability to to run a "Reset to Default Value" for strings would considered a fix.

Yep, can confirm this is happening in the supplied blend.
I can also reproduce it in new blends. I've tried adjusting various settings(like setting or clearing a default value) of the prop before attempting to reset to defaults. Sometimes it would not crash, but I could not find a consistent method to do this.

Crash with:

Address : 0x00007FF621666643
Module : H:\Blender\Blender2.81\blender.exe

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.20

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-13 16:25, hash: rB9bd0d8b5505a