Blender exit with code -6 with message Attempt to free NULL pointer. #70315

New Issue

Hai Vu · 2019-09-28T07:38:43+02:00

Hai Vu commented

2019-09-28 07:38:43 +02:00

System Information
Tested operating system:
* Ubuntu 16.04.6, GNU/Linux 4.4.0-161-generic x86_64
* macOS 10.14.6 Darwin 18.7.0
Tested graphics card and CPU:
* NVIDIA GTX 1080Ti, AMD Radeon RX580
* Any CPU

Blender Version
Broken: 2.79b and 2.80 downloaded from the Blender website.

Short description of error

Quit the Blender will produce exit code -6 with message Attempt to free NULL pointer.
This is the file which cause the error.

Exact steps for others to reproduce the error

* Open Blender in terminal (for logging purpose).
* Load [this file](https://1drv.ms/u/s!Au3cARgGkempgQFVBocpytFVWO0i?e=gQnheO).
* Open the the Image Viewer (which list all the images in the file) or just render the file (the render is normal).
* This line of log appear in the terminal: `IMB_ibImageFromMemory: NULL pointer`.
* Quit the blender, the program quits with exit code `-6` with this line of log (in terminal): `Attempt to free NULL pointer`.

If you render the file above on headless mode, no image is saved to the directory. This will make the flamenco render job failed if you are using Blender Cloud.

The bug may come the library called BGERTPS which is made for Blender Game Engine. [This function] (https:*github.com/martijnberger/blender/blob/master/source/blender/imbuf/intern/readimage.c#L104) produce the error above.

**System Information** Tested operating system: * Ubuntu 16.04.6, GNU/Linux 4.4.0-161-generic x86_64 * macOS 10.14.6 Darwin 18.7.0 Tested graphics card and CPU: * NVIDIA GTX 1080Ti, AMD Radeon RX580 * Any CPU **Blender Version** Broken: 2.79b and 2.80 downloaded from the Blender website. **Short description of error** Quit the Blender will produce exit code `-6` with message `Attempt to free NULL pointer`. This is [the file](https://1drv.ms/u/s!Au3cARgGkempgQFVBocpytFVWO0i?e=gQnheO) which cause the error. **Exact steps for others to reproduce the error** * Open Blender in terminal (for logging purpose). * Load [this file](https://1drv.ms/u/s!Au3cARgGkempgQFVBocpytFVWO0i?e=gQnheO). * Open the the Image Viewer (which list all the images in the file) or just render the file (the render is normal). * This line of log appear in the terminal: `IMB_ibImageFromMemory: NULL pointer`. * Quit the blender, the program quits with exit code `-6` with this line of log (in terminal): `Attempt to free NULL pointer`. If you render the file above on headless mode, no image is saved to the directory. This will make the flamenco render job failed if you are using Blender Cloud. The bug may come the library called [BGERTPS](https:*github.com/enjalot/BGERTPS) which is made for Blender Game Engine. [This function] (https:*github.com/martijnberger/blender/blob/master/source/blender/imbuf/intern/readimage.c#L104) produce the error above.

Hai Vu commented

2019-09-28 07:38:43 +02:00

Added subscriber: @aperture147

Hai Vu commented

2019-09-28 07:40:24 +02:00

Another bug reference: https://blenderartists.org/t/e-cycles-faster-rendering-for-blender-2-79-to-2-81/1139717/2478?u=aperture147

Germano Cavalcante commented

2019-09-30 21:10:20 +02:00

Added subscriber: @mano-wii

Bastien Montagne was assigned by Germano Cavalcante

2019-09-30 21:10:20 +02:00

Germano Cavalcante commented

2019-09-30 21:10:20 +02:00

I can reproduce the problem.
Simply open and close the attached file.
I'm not sure what is causing this problem, but I suppose it involves data block management.

I can reproduce the problem. Simply open and close the attached file. I'm not sure what is causing this problem, but I suppose it involves data block management.

Bastien Montagne commented

2019-10-01 17:13:04 +02:00

@mano-wii please investigate a minimum before assigning, that has again nothing to do with data management, that’s a mere corrupted .blend file.

@aperture147 we require a small and simple .blend file, not a 600MB one, and a way to reproduce the issue. Here your monster .blend is corrupted somehow, one of the packedfile struct gets a NULL data pointer when reading it, which is not supposed to happen ever. So unless you can provide us with a way to recreate such corruption, we won't be able to do anything to the root of the issue.

In the mean time, I’ll add some sanity checks in reading code to detect/cleanup such cases...

@mano-wii please investigate a minimum before assigning, that has again nothing to do with data management, that’s a mere corrupted .blend file. @aperture147 we require a **small** and **simple** .blend file, not a 600MB one, and a way to reproduce the issue. Here your monster .blend is corrupted somehow, one of the packedfile struct gets a NULL data pointer when reading it, which is not supposed to happen ever. So unless you can provide us with a way to recreate such corruption, we won't be able to do anything to the root of the issue. In the mean time, I’ll add some sanity checks in reading code to detect/cleanup such cases...

blender-admin commented

2019-10-01 20:02:57 +02:00

This issue was referenced by b1b4e00076

This issue was referenced by b1b4e0007663f3430754d522e888b8dedfc850f9

Bastien Montagne commented

2019-10-01 20:08:22 +02:00

Changed status from 'Open' to: 'Resolved'

Bastien Montagne closed this issue

2019-10-01 20:08:22 +02:00

Hai Vu commented

2019-10-02 13:42:36 +02:00

Thanks for your quick fix! I'm trying to figure how the packedfile be NULL and I will send the result for you as soon as I can

Hai Vu commented

2020-10-16 09:13:06 +02:00

Hi guys, it's been a year and I've finally found the reason why. This blender file was generated by our system, grab all the files in the model library and pack them to a single file then render it. Lately we just figured out that there're a few of corrupted image (which is used as texture) with normal file header but have no data in it (a JPEG with only 1KB in size). I'm trying to find some sample files for you because another engineer in my team just cleaned up those files without my permission. Hope this description can help you to find some better way to fix this problem.

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Blender exit with code -6 with message Attempt to free NULL pointer. #70315

Blender exit with code `-6` with message `Attempt to free NULL pointer`. #70315