bpy.ops.fluid.free_all() can cause a crash #89063
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Reference: blender/blender#89063
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System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1050/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.77
Blender Version
Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash:
84da05a8b8
Worked: (newest version of Blender that worked as expected)
Short description of error
python script to free and re-bake smoke can cause a crash in 2.9x
Exact steps for others to reproduce the error
The description of this bug is clearly documented along with the example blend file in this blender stackexchange question .
If I comment out the lines that contain:
in the following script, and instead manually free the bakes, all is fine. Otherwise the application crashes with console messages like:
even if run from cmd line as Administrator
dual smoke.blend
Added subscriber: @jamestomk
Added subscriber: @rjg
Added subscriber: @PratikPB2123
Changed status from 'Needs Triage' to: 'Confirmed'
@rjg can you reproduce the crash?
I can replicate this.
I can also reproduce this in master. There appears to be a use-after-free according to ASAN in 3.0. I haven't had the time to check with an 2.93 LTS + ASAN build yet.
Issues appears to be the same for 2.93.
Edi: Since I currently don't have time to investigate this further and I'm not sure if the
physics_fluid.c
or WindowManager code is at fault here, I'm tagging both the Physics and UI module.Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
Added subscriber: @hal9000
Added subscriber: @Tiok
Added subscriber: @dfelinto
Thanks for the report. Marking this as known issue since it depends on the old particle settings which is end of life .
Just noting this still crashes in current main (maybe for other reasons because I had a different stacktrace), but it still crashes.
bpy.ops.fluid.bake_data()
from the Interface locks the UI, doing this from a script [the operator I mean] should probably poll if jobs are running.eureka -- gracias Philipp! sure enough, and oddly the following code
is_job_running('COMPOSITE')
works, even though "job is running" isn't printed (is_job_running returns False):UPDATE: Stranger still, if I just use the code:
which is what the previous effectively does, the program again crashes.
and in fact what works is actually all in how fast this script calls free(), by a delay before calling free_all():