Crash when importing numpy. #82461

New Issue

Peisen Wang · 2020-11-06T14:44:20+01:00

Peisen Wang commented

2020-11-06 14:44:20 +01:00

System Information
Operating system: Ubuntu 20.10 64-bit (Linux-5.8.0-26-generic-x86_64-with-debian-bullseye-sid 64 Bits)
Graphics card: AMD RENOIR (DRM 3.38.0, 5.8.0-26-generic, LLVM 11.0.0) X.Org 4.6 (Core Profile) Mesa 20.2.1

Blender Version
Broken: version: 2.83.8, branch: master, commit date: 2020-10-21 08:12, hash: 5949b796f0; 2.90.1; 2.92.0 alpha
Worked: (newest version of Blender that worked as expected)

Short description of error
Importing numpy inside blender python console cause blender to crash (Aborted).

Exact steps for others to reproduce the error
With fresh downloaded and unzipped blender, open it and switch to scripting, type into the python console:

import numpy

Blender immediately crashes. Command line output:

Aborted (core dumped)

Importing other builtin or pip-installed modules without numpy as dependency, for example requests and PIL, will not cause crashing.

Running python script including "import numpy" inside blender or passed with "--python" will crash it too, but it runs fine with "--background".

Also tried on the system package manager installed blender 2.83.5, which uses the system python from /usr/bin/python3.8, no crash occurred.

Tried on a few nearby machines with Ubuntu 16.04 and 18.04, no similar problem were encountered.

ThreadStacktrace

Stacktrace

**System Information** Operating system: Ubuntu 20.10 64-bit (Linux-5.8.0-26-generic-x86_64-with-debian-bullseye-sid 64 Bits) Graphics card: AMD RENOIR (DRM 3.38.0, 5.8.0-26-generic, LLVM 11.0.0) X.Org 4.6 (Core Profile) Mesa 20.2.1 **Blender Version** Broken: version: 2.83.8, branch: master, commit date: 2020-10-21 08:12, hash: `5949b796f0`; 2.90.1; 2.92.0 alpha Worked: (newest version of Blender that worked as expected) **Short description of error** Importing numpy inside blender python console cause blender to crash (Aborted). **Exact steps for others to reproduce the error** With fresh downloaded and unzipped blender, open it and switch to scripting, type into the python console: ``` import numpy ``` Blender immediately crashes. Command line output: ``` Aborted (core dumped) ``` Importing other builtin or pip-installed modules without numpy as dependency, for example requests and PIL, will not cause crashing. Running python script including "import numpy" inside blender or passed with "--python" will crash it too, but it runs fine with "--background". Also tried on the system package manager installed blender 2.83.5, which uses the system python from /usr/bin/python3.8, no crash occurred. Tried on a few nearby machines with Ubuntu 16.04 and 18.04, no similar problem were encountered. [ThreadStacktrace](https://archive.blender.org/developer/F9218451/ThreadStacktrace) [Stacktrace](https://archive.blender.org/developer/F9218454/Stacktrace)

Peisen Wang commented

2020-11-06 14:44:20 +01:00

Added subscriber: @peisen

Robert Guetzkow commented

2020-11-06 14:56:02 +01:00

Added subscriber: @rjg

Robert Guetzkow commented

2020-11-06 14:56:02 +01:00

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

Robert Guetzkow commented

2020-11-06 14:56:02 +01:00

I can't reproduce this on Linux or Windows. Could you please start Blender with the following debug flags and try to make it crash again?

./blender --debug --debug-cycles > ~/blender_debug_output.txt 2>&1

Please attach the debug log to your ticket.

I can't reproduce this on Linux or Windows. Could you please start Blender with the following debug flags and try to make it crash again? ``` ./blender --debug --debug-cycles > ~/blender_debug_output.txt 2>&1 ``` Please attach the debug log to your ticket.

Peisen Wang commented

2020-11-06 17:48:40 +01:00

Hi, this is the debug output after crashing blender 2.90.1

blender_debug_output.txt

Also FYI below is the log from the system-installed blender 2.83.5 after performing the same operations and exiting.

blender_2.83.5_debug_output.txt

Hi, this is the debug output after crashing blender 2.90.1 [blender_debug_output.txt](https://archive.blender.org/developer/F9219746/blender_debug_output.txt) Also FYI below is the log from the system-installed blender 2.83.5 after performing the same operations and exiting. [blender_2.83.5_debug_output.txt](https://archive.blender.org/developer/F9219783/blender_2.83.5_debug_output.txt)

Robert Guetzkow commented

2020-11-06 18:58:30 +01:00

Thank you for the log files. You've got a couple errors there that look similar to the ones reported in #81835 and here . They might not be related to Python, but this could cause some undefined behavior that just results in a crash later on.

LLVM triggered Diagnostic Handler: Illegal instruction detected: VOP* instruction violates constant bus restriction
renamable $vgpr4 = V_CNDMASK_B32_e32 32768, killed $vgpr5, implicit killed $vcc, implicit $exec
LLVM failed to compile shader
radeonsi: can't compile a main shader part
LLVM triggered Diagnostic Handler: Illegal instruction detected: VOP* instruction violates constant bus restriction
renamable $vgpr4 = V_CNDMASK_B32_e32 32768, killed $vgpr4, implicit killed $vcc, implicit $exec
LLVM failed to compile shader
radeonsi: can't compile a main shader part

Could you please download the latest build of 2.92 (if you haven't already) and then run the following command.

./blender --debug --debug-gpu --debug-python > ~/blender_debug_output.txt 2>&1

Upload the log file again and also the crash report that can be found in /tmp, if Blender is able to write it.

Thank you for the log files. You've got a couple errors there that look similar to the ones reported in #81835 and [here ](https://bugzilla.redhat.com/show_bug.cgi?id=1879404). They might not be related to Python, but this could cause some undefined behavior that just results in a crash later on. ``` LLVM triggered Diagnostic Handler: Illegal instruction detected: VOP* instruction violates constant bus restriction renamable $vgpr4 = V_CNDMASK_B32_e32 32768, killed $vgpr5, implicit killed $vcc, implicit $exec LLVM failed to compile shader radeonsi: can't compile a main shader part LLVM triggered Diagnostic Handler: Illegal instruction detected: VOP* instruction violates constant bus restriction renamable $vgpr4 = V_CNDMASK_B32_e32 32768, killed $vgpr4, implicit killed $vcc, implicit $exec LLVM failed to compile shader radeonsi: can't compile a main shader part ``` Could you please download the [latest build of 2.92 ](https://builder.blender.org/download/) (if you haven't already) and then run the following command. ``` ./blender --debug --debug-gpu --debug-python > ~/blender_debug_output.txt 2>&1 ``` Upload the log file again and also the crash report that can be found in `/tmp`, if Blender is able to write it.

Peisen Wang commented

2020-11-07 04:20:45 +01:00

This is the log file after crashing from blender 2.92.0 Alpha, branch: master, commit date: 2020-11-06 06:10, hash: 9a7da1242d, launched with the provided command:

blender_2.92.0_debug_output.txt

There are no blender crash report in /tmp.

This is the log file after crashing from blender 2.92.0 Alpha, branch: master, commit date: 2020-11-06 06:10, hash: `9a7da1242d`, launched with the provided command: [blender_2.92.0_debug_output.txt](https://archive.blender.org/developer/F9223997/blender_2.92.0_debug_output.txt) There are no blender crash report in `/tmp`.

Robert Guetzkow commented

2020-11-07 09:53:01 +01:00

Currently there seem to be two issues, one is with your graphics driver and one with Python. If you're able to, could you please try to update the graphics driver? Mesa 20.2.1 is already fairly recent, but the errors indicate an issue with it.

Robert Guetzkow commented

2020-11-16 14:28:03 +01:00

@peisen Have you checked if upgrading or downgrading the graphics driver makes any difference?

mantissa commented

2020-11-22 22:17:20 +01:00

Added subscriber: @Mantissa

mantissa commented

2020-11-22 22:17:20 +01:00

Can confirm this behavior with a Radeon 5700XT on Ubuntu 20.10 (also Mesa 20.2.1) with building from source 7bab87c119. Same thing happens when trying to enable an addon that imports numpy.

system-info.txt

Can confirm this behavior with a Radeon 5700XT on Ubuntu 20.10 (also Mesa 20.2.1) with building from source 7bab87c119f4. Same thing happens when trying to enable an addon that imports numpy. [system-info.txt](https://archive.blender.org/developer/F9356173/system-info.txt)

Robert Guetzkow commented

2020-11-22 22:20:30 +01:00

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

Philipp Oeser commented

2020-11-25 13:21:22 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-11-25 13:21:22 +01:00

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

Philipp Oeser commented

2020-11-25 13:21:22 +01:00

Hm, also cannot reproduce.

**System Information**
Operating system: Linux-5.9.8-200.fc33.x86_64-x86_64-with-fedora-33-Thirty_Three 64 Bits
Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 455.45.01
version: 2.92.0 Alpha, branch: master, commit date: 2020-11-24 12:22, hash: `rB278011e44d43`

So, Python is at 3.7.7
Numpy should be at 1.17.5

@Mantissa : if you are building yourself: which numpy are you using? (PYTHON_NUMPY_PATH in cmake) If you are not using using the precompiled libs from https:*svn.blender.org/svnroot/bf-blender/trunk/lib/linux_centos7_x86_64, could you check if these are working? See https:*wiki.blender.org/wiki/Building_Blender/Linux/Ubuntu

Hm, also cannot reproduce. ``` **System Information** Operating system: Linux-5.9.8-200.fc33.x86_64-x86_64-with-fedora-33-Thirty_Three 64 Bits Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 455.45.01 version: 2.92.0 Alpha, branch: master, commit date: 2020-11-24 12:22, hash: `rB278011e44d43` ``` So, Python is at 3.7.7 Numpy should be at 1.17.5 @Mantissa : if you are building yourself: which numpy are you using? (PYTHON_NUMPY_PATH in cmake) If you are not using using the precompiled libs from https:*svn.blender.org/svnroot/bf-blender/trunk/lib/linux_centos7_x86_64, could you check if these are working? See https:*wiki.blender.org/wiki/Building_Blender/Linux/Ubuntu

Robert Guetzkow commented

2020-12-18 11:25:40 +01:00

@peisen @Mantissa could you provide the information @lichtwerk asked for? Otherwise we will have to close the ticket for inactivity as the issue cannot be reproduced with the currently provided information.

mantissa commented

2020-12-18 20:48:26 +01:00

I've changed hardware since this report. Unfortunately I was experiencing too many visual bugs and driver crashes using the open source AMD drivers with the 5700XT while working in Blender.

@lichtwerk Before I swapped out the gpu though, I was using the precompiled libs.

I've changed hardware since this report. Unfortunately I was experiencing too many visual bugs and driver crashes using the open source AMD drivers with the 5700XT while working in Blender. @lichtwerk Before I swapped out the gpu though, I was using the precompiled libs.

Robert Guetzkow commented

2021-01-01 14:34:35 +01:00

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

Robert Guetzkow closed this issue

2021-01-01 14:34:35 +01:00

Robert Guetzkow commented

2021-01-01 14:34:35 +01:00

Unfortunately, we currently don't know how to reproduce the issue and therefore can't identify were the problem came from. Since this ticket has been inactive for more than a week and @Mantissa you aren't able to reproduce the problem yourself anymore and @peisen hasn't replied, I'll close this ticket for now. Should the problem reoccur please leave a comment on this ticket and we can reopen it.

Robert Guetzkow commented

2021-01-20 13:56:45 +01:00

This might be the same problem as #84752 in which case we have identified a workaround.

Petr Dlouhý commented

2021-02-25 15:02:04 +01:00

Added subscriber: @petr.dlouhy

Petr Dlouhý commented

2021-02-25 15:02:04 +01:00

This issue is still present in Blender 2.92 RC (tested with Ubuntu 20.10).
Seems like big deal, because it can makes Blender unable to start (if certain add-ons are activated).

This issue is still present in Blender 2.92 RC (tested with Ubuntu 20.10). Seems like big deal, because it can makes Blender unable to start (if certain add-ons are activated).

Robert Guetzkow commented

2021-02-25 15:31:42 +01:00

@petr.dlouhy If you are referring to the issue in #84752, then this should be fixed in Blender 2.93 as the Python version has been upgraded to 3.9.x. This is unaddressed in 2.92 though and would require a manual tweak of 2.92/python/lib/python3.7/ctypes/__init__.py commenting / removing the lines as done in this commit . The issue is in Python and since the fix is only in 3.8.x and later this is not solved in Blender 2.92 that uses Python 3.7.7 like the previous versions.

@petr.dlouhy If you are referring to the issue in #84752, then this should be fixed in Blender 2.93 as the Python version has been upgraded to 3.9.x. This is unaddressed in 2.92 though and would require a manual tweak of `2.92/python/lib/python3.7/ctypes/__init__.py` commenting / removing the lines as done in [this commit ](https://github.com/python/cpython/commit/674e9389e9fdadd622829f4833367ac3b38475b5). The issue is in Python and since the fix is only in 3.8.x and later this is not solved in Blender 2.92 that uses Python 3.7.7 like the previous versions.

Petr Dlouhý commented

2021-02-25 19:03:01 +01:00

@rjg Yes, I guess, this issue is duplicate of ##84752. The description responds, the tweak works.

I can do the tweak, but I can't tell, how many other users won't be able to do it and end up with crashing Blender.

@rjg Yes, I guess, this issue is duplicate of ##84752. The description responds, the tweak works. I can do the tweak, but I can't tell, how many other users won't be able to do it and end up with crashing Blender.

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Crash when importing numpy. #82461