Crash with boolean modifier exact mode depending on face orientation (regression from 3.3.1 to 3.3.2) #103423
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Reference: blender/blender#103423
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System Information
Operating system: macOS-13.0.1-arm64-arm-64bit 64 Bits
Graphics card: Apple M1 Max Apple 4.1 Metal - 83
Blender Version
Broken: version: 3.3.2, 3.5.0 Alpha, branch: master, commit date: 2022-12-21 20:25, hash:
cef5841e12Worked: 3.2.2; 3.3.1
Short description of error
The specific combination of modifiers in the file consistently crashes blender when moving around the first object
Changing the boolean from exact to fast avoids the crash. After applying the displacement modifier, the crash still occurs, but when simply removing it crashing is much less likely to occur (but in the end with some patience it still does).
Exact steps for others to reproduce the error
With the attached blend file, grab the sphere object and move it around for a few seconds.
Crash moving 2.blend
Crash log moving.txt
Added subscriber: @blenderrocket
#103924 was marked as duplicate of this issue
#104179 was marked as duplicate of this issue
#103072 was marked as duplicate of this issue
#103774 was marked as duplicate of this issue
#103458 was marked as duplicate of this issue
#103274 was marked as duplicate of this issue
Another way to trigger a crash: switch between intersect and union in the boolean modifier a few times in succession.
Added subscriber: @PratikPB2123
Changed status from 'Needs Triage' to: 'Needs User Info'
Hi, thanks for the report. Does this happen with factory settings?: {nav File > Defaults > Load Factory Settings}
Yes it does
Changed status from 'Needs User Info' to: 'Needs Triage'
Added subscriber: @mano-wii
Changed status from 'Needs Triage' to: 'Needs User Info'
I cannot reproduce this with either moving the object or switch between intersection and union.
Can you try different Blender versions? https://builder.blender.org/download/
System Information
Operating system: macOS-12.2-arm64-arm-64bit 64 Bits
Graphics card:
Metal API Apple M1 1.2Blender versions (all macOS apple silicon):
3.2.2 no crash
3.3.1 no crash
3.3.2 crash
3.4.1 crash
So it is a regression between 3.3.1 and 3.3.2.
It only happens with the apple silicon versions, not with intel versions on the same Mac.
Investigated it a little bit more: it seems to be caused by the boolean exact mode and the orientation of the faces of the objects. The subdivision surface modifier and the displace modifier can be removed and the crash still occurs, just a bit less often.
Simplest way to reproduce:
Object 1: default cube
Object 2: second cube with a boolean modifier in exact mode referencing the 1st cube
With the default orientation of the cubes, no crash occurs. When either or both are rotated any amount on one axis no crash occurs. However when either or both are rotated on two axes, a crash occurs within a few seconds of moving the cube around.
If you add a cone or UV sphere instead of a cube as the second object, the crash occurs without applying any rotation. With a cylinder crashes occur after rotation on either the x or y axis.
Crash when moving around object with displacement and boolean combined with subdivided objectto Crash with boolean exact mode depending on orientation of the faces (regression from 3.2 to 3.3)Crash with boolean exact mode depending on orientation of the faces (regression from 3.2 to 3.3)to Crash with boolean modifier exact mode depending on face orientation (regression from 3.2 to 3.3)Crash with boolean modifier exact mode depending on face orientation (regression from 3.2 to 3.3)to Crash with boolean modifier exact mode depending on face orientation (regression from 3.3.1 to 3.3.2)Just a guess, but it might only occur on macOS 13? It is so easy to trigger with any boolean that I would expect to have noticed it earlier otherwise.
Changed status from 'Needs User Info' to: 'Needs Triage'
This also affects the geometry nodes mesh boolean node. See attached screenshot, if you change a second rotation value in the transform by dragging with the mouse, Blender crashes within seconds.
Changed status from 'Needs Triage' to: 'Confirmed'
Added subscriber: @howardt
I updated the Mac to
Ventura 13.1and was able to replicate the issue.I couldn't replicate in a local build. (this may make it more difficult for the developer to investigate and fix the problem).
Could it be that this is a bug in the buildbot compiler?
In the crash log 2 threads seem to have caused the error:
crash-log.txt
@howardt, does this ring a bell?
Added subscribers: @dpet911, @ThomasDinges, @HooglyBoogly, @mrWonderful
Added subscriber: @Chris_Blackbourn
Confirm crash in debugger with git master, apple silicon (M1 pro) macos (Venture 13.0.1) . Ensure you have
-DWITH_GMP=ONIt only crashes about 20% of the time.
Repro steps:
Crash moving 2.blendAdded subscriber: @Wintyr
I can confirm the crash on my M1 mac pro.
When was the GMP lib last updated? Can someone roll it back to the previous version and retest?
Any progress with this yet?
Added subscriber: @lichtwerk
No crash here
So this is MAC only?
This seems to be Mac Apple silicon only. The GMP multiprecision library only in this last version added support for Apple silicon and I suspect it is buggy. Sorry, I didn't have time to work on this during my vacation.
No disrespect Howard, I was just curious. I hope you had a good vacation.
I have verified that using GMP library version 6.2.0 (in our svn library: that was r62544, from Feb 2021) instead of the current 6.2.1 (which was introduced for Blender 3.1, svn revision r62798), the crash does not happen. The transition from 6.2.0 to 6.2.1 was when GMP introduced "Initial support for Darwin on arm64". So while it would fix our problem to downgrade the gmp library to 6.2.0, this would also mean slower portable code for multiprecision arithmetic on ARM.
Since the crashes started happening only recently, long after we started using gmp 6.2.1, I will try to bisect to the commit that caused us to start failing with that library, to at least see if it is out fault or gmp's fault.
One reason the crashes only started happening recently is that they only seem to occur on MacOS 13.
This might be the commit you need?: introducing a GMP patch between 3.3.1 and 3.3.2: https://developer.blender.org/rB2fb0640
I investigated more and think we are going to have to revert to use --disable-assembly on Mac ARM builds (at least for MacOS Ventura 13.1, but I don't think we can distribute different builds and/or different pre-built libraries depending on OS version ). The GMP library is currently failing its own tests on that combination. There have been bug reports (e.g., https:*gmplib.org/list-archives/gmp-bugs/2022-November/005217.html and https:*gmplib.org/list-archives/gmp-bugs/2022-December/005222.html) that don't seem resolved (I will make my own soon too).
There are currently four revisions of the gmp library in lib/darwin_arm64/gmp:
r62544 - committed 2021-02-02
r62798 - committed 2022-01-21
r63065, committed 2022-10-20
r63162 committed 2022-12-07
The last three of those are all compiles of GMP version 6.2.1, and I believe the last one (most recent) has patch https://gmplib.org/repo/gmp-6.2/rev/561a9c25298e applied (which is a security patch that appears to only affect 32 bit architectures and only an input routine that I don't believe I use in Blender). The first one was a compile of version 6.2.0 of GMP, which did not have assembly language for ARM yet.
The GMP library status for 6.2.1 says that they used a register that MacOS
I tested current master with the only change being the gmp library files in the prebuilt library folder.
In my tests, all of the last three versions of the SVN library caused the crash referenced in this bug. Only the first one -- the one that uses portable C code only -- worked.
I tested Blender with a build I just made of GMP version 6.2.1 (the current snapshot at their download site, dated 14-Nov-2020) configured with the --disable-assembly flag, and I could not make it crash with that library. So I think that's what we should do for now.
This issue was referenced by
8d2f4ddb2fThis issue was referenced by
4d25c6b86eChanged status from 'Confirmed' to: 'Resolved'
This issue was referenced by None@63168
The example file still triggers a crash for me.
System Information
Operating system: macOS-13.1-arm64-arm-64bit 64 Bits
Graphics card: Metal API Apple M1 Max 1.2
Blender Version
Broken: version: 3.5.0 Alpha, branch: master, commit date: 2023-01-10 21:12, hash:
dd9e1eded0x0: 0x000000017902b000 x1: 0x0000000000000000 x2: 0x00000000000120a8 x3: 0x00000001de56ae88
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x12: 0x0000010000000000 x13: 0x0000000000000000 x14: 0x0000000000000000 x15: 0x0000000000000000
x16: 0xf61f4affa02144b8 x17: 0xf6004affa02144b8 x18: 0x0000000000000000 x19: 0xc50ad3066d10a4f2
x20: 0x0000000179023a08 x21: 0x00000001de575000 x22: 0x0000600000d66580 x23: 0x0000600000972cb0
x24: 0x0000600000972e00 x25: 0x3cb0000000000000 x26: 0x0000000000000001 x27: 0x00000000ffffffff
x28: 0x0000600000972df8 fp: 0x0000000179023900 lr: 0x2c60000183136248
sp: 0x0000000179023900 pc: 0x00000001831f8834 cpsr: 0x20001000
far: 0x00000001079bbc5c esr: 0xf200c473 (Breakpoint) pointer authentication trap DB
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Added subscribers: @Bombar, @mod_moder
Changed status from 'Resolved' to: 'Needs Developer To Reproduce'
The situation appears to have improved, but the problem apparently has not been fully corrected. It can still be replicated with builds downloaded from https://builder.blender.org/download/
This is all very disappointing as it shows that merely passing GMPs self tests is not sufficient to say that we are ok, meaning that either their tests aren't covering everything or we have some real bug in our use of GMP that still needs to be found. Perhaps a threading bug, since this is an intermittent problem. I will investigate further on the weekend.
Sorry if it is a stupid question, but are you absolutely sure that patch is not the problem? Looking at the changelog it seems to be the only relevant change that has been applied between 3.3.1 and 3.3.2, and 3.3.1 does not crash at all. If a build could be provided without the patch I would be happy to try.
I can confirm this fact, version 3.3.1 is stable in this case.
Wouter and Timofey - how exactly are you testing version 3.3.1?
What I have been doing is testing the latest master when loaded against the various revisions of the gmp library in our svn library. On my machine, it crashes with every single revsion except the very first one for the ARM architecture (the only one that doesn't use assembly language versions of library). This includes crashes with revisions that predate the patch in question.
What I tested today was: first, I compiled against the gmp libraries currently in SVN and confirmed that it crashes; then I tried making my own gmp library using "make deps", which uses the method that I believe Brecht used to build the library that is now in the svn repository. The version I built (which includes the patch), never crashed. My only theory is that I think I am using a different version of the compiler tool chain than was used at Blender HQ to make the libraries in the svn repository. I am using XCode version 14.1, and Apple clang version 14.0.0 (clang-1400.0.29.202) with target: arm64-apple-darwin22.2.0, I notice slightly different slzes of libgmp.a (mine is 1237400 bytes, the repository one is 1118872.
Brecht do you have any idea on how to proceed here? I could submit my own compiled version of libgmp.a and libgmpxx.a to the repository, but it seems likely that that could soon get overwritten the next time you do library maintenance. so seems a bad idea. You could try upgrading to a newer XCode and toolchain. You could try compiling without the gmp patch, since others in this thread seem to believe that that is the problem. I am at a bit of a loss as to what to do here.
Downloaded the version from https://download.blender.org/release/Blender3.3/
Yes, I downloaded this version blender-3.3.1-macos-arm64.dmg 05-Oct-2022 08:32. It doesn't crash at all, i tried on different files which caused almost immediate crash.
Added subscriber: @EngineersNeedArt
Just did amake updateand built from Xcode on my 24" M1 iMac and the Blender file attached to #103873 now opens without crashing.I may have posted too soon. Crashed opening a slightly modified version of the file. Crashing in:
Yes, still crashes for me with the latest master build and libraries. I also tried starting Blender with only 1 thread to see if somehow it was a mutliprocessing bug, but it crashed then too. I remain stuck that I can stop the crashes by building GMP myself on my machine, but the library built by Brecht fails, with my best guess being that we used different versions of the compiler.
This issue was referenced by None@63175
Changed status from 'Needs Developer To Reproduce' to: 'Resolved'
I confirm that this latest library commit fixes things locally for me too, both for the test file in this bug and the one in #103458. Thanks, Brecht!
Thanks! Can confirm it being fixed in the latest daily build too.
Added subscribers: @fuvesib, @jgrogreene
Perfect! Last update fixed my problem.
Added subscriber: @gwenhidwy
Added subscriber: @Macwelshman