compositor: crash on using the viewer node inside of group nodes #40986

New Issue

Sir Torx Screwdriver · 2014-07-08T00:24:49+02:00

2014-07-08 00:24:49 +02:00

System Information
Windows 8.1 Pro

Blender Version
Broken: latest official 2.71 build hash 9337574 2014-06-25 18:36

Short description of error
adding a viewer node inside of node groups either by ctrl-shift clicking a node or select it via add>[...]causes random crashes.
I've managed to build a simple file to reproduce the issue

Exact steps for others to reproduce the error
here's a simple file

group_nodes_viewer_node_crashes1.blend

[provided you have "load UI" enabled you should get an image editor and a compositor screen]

render the scene (just a cube not even any lighting takes just a second or two :) ) ; the crash only seems to appear whenever the image has been rendered previously.

select the node group in the middle, hit tab to get into it.

now ctrl+shift clicking on any one of the three nodes instantly crashes blender over here.

Hope you can easily reproduce this thing
Thanks!

**System Information** Windows 8.1 Pro **Blender Version** Broken: latest official 2.71 build hash 9337574 2014-06-25 18:36 **Short description of error** adding a viewer node inside of node groups either by ctrl-shift clicking a node or select it via add>[...]causes random crashes. I've managed to build a simple file to reproduce the issue **Exact steps for others to reproduce the error** here's a simple file [group_nodes_viewer_node_crashes1.blend](https://archive.blender.org/developer/F97027/group_nodes_viewer_node_crashes1.blend) [provided you have "load UI" enabled you should get an image editor and a compositor screen] render the scene (just a cube not even any lighting takes just a second or two :) ) ; the crash only seems to appear whenever the image has been rendered previously. select the node group in the middle, hit tab to get into it. now ctrl+shift clicking on any one of the three nodes instantly crashes blender over here. Hope you can easily reproduce this thing Thanks!

Sir Torx Screwdriver commented

2014-07-08 00:24:49 +02:00

Changed status to: 'Open'

Sir Torx Screwdriver commented

2014-07-08 00:24:49 +02:00

Added subscriber: @particleemitter

Sir Torx Screwdriver commented

2014-07-08 00:29:48 +02:00

""the crash only seems to appear whenever the image has been rendered previously.""
sorry I got that wrong!
There seems to be no need to render the image first. That doesn't seem to make any difference. sorry for any confusion if you read this after reading the original comment

""the crash only seems to appear whenever the image has been rendered previously."" sorry I got that wrong! There seems to be no need to render the image first. That doesn't seem to make any difference. sorry for any confusion if you read this after reading the original comment

Kévin Dietrich commented

2014-07-08 03:53:29 +02:00

Added subscriber: @kevindietrich

Kévin Dietrich commented

2014-07-08 03:53:29 +02:00

I'm getting:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffcac99700 (LWP 5990)]
ScaleOperation::executePixelSampled (
    this=<error reading variable: Cannot access memory at address 0xffffffffffffffb8>, 
    this@entry=<error reading variable: Cannot access memory at address 0x8>, 
    output=<error reading variable: Cannot access memory at address 0xffffffffffffffb0>, 
    output@entry=<error reading variable: Cannot access memory at address 0x8>, x=<error reading variable: Cannot access memory at address 0xffffffffffffffac>, x@entry=<error reading variable: Cannot access memory at address 0x8>, 
    y=<error reading variable: Cannot access memory at address 0xffffffffffffffa8>, y@entry=<error reading variable: Cannot access memory at address 0x8>, 
    sampler=<error reading variable: Cannot access memory at address 0xffffffffffffffa4>, 
    sampler@entry=<error reading variable: Cannot access memory at address 0x8>) at /home/kevin/src/blender-git/blender/source/blender/compositor/operations/COM_ScaleOperation.cpp:85

85 }

But I can't seem to get a useful backtrace from gdb.

I'm getting: ``` Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffcac99700 (LWP 5990)] ScaleOperation::executePixelSampled ( this=<error reading variable: Cannot access memory at address 0xffffffffffffffb8>, this@entry=<error reading variable: Cannot access memory at address 0x8>, output=<error reading variable: Cannot access memory at address 0xffffffffffffffb0>, output@entry=<error reading variable: Cannot access memory at address 0x8>, x=<error reading variable: Cannot access memory at address 0xffffffffffffffac>, x@entry=<error reading variable: Cannot access memory at address 0x8>, y=<error reading variable: Cannot access memory at address 0xffffffffffffffa8>, y@entry=<error reading variable: Cannot access memory at address 0x8>, sampler=<error reading variable: Cannot access memory at address 0xffffffffffffffa4>, sampler@entry=<error reading variable: Cannot access memory at address 0x8>) at /home/kevin/src/blender-git/blender/source/blender/compositor/operations/COM_ScaleOperation.cpp:85 ``` 85 } But I can't seem to get a useful backtrace from gdb.

Kévin Dietrich commented

2014-07-08 04:04:56 +02:00

Here's another try:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc7874700 (LWP 6240)]

0x00000000024282e9 in MixGlareOperation::executePixelSampled (this=0x7fffd00058b0, output=0x7fffcac99ff8, x=1022, y=620, sampler=COM_PS_NEAREST)

    at /home/kevin/src/blender-git/blender/source/blender/compositor/operations/COM_MixOperation.cpp:473

473 output- [x] = mf * max(inputColor1- [x] + value * (inputColor2- [x] - inputColor1- [x]), 0.0f);

(gdb) bt

#0 0x00000000024282e9 in MixGlareOperation::executePixelSampled (this=0x7fffd00058b0, output=0x7fffcac99ff8, x=1022, y=620, sampler=COM_PS_NEAREST)

    at /home/kevin/src/blender-git/blender/source/blender/compositor/operations/COM_MixOperation.cpp:473

1 0x00000000023f9a45 in SocketReader::readSampled (this=0x7fffd00058b0, result=0x7fffcac99ff8, x=1022, y=620, sampler=COM_PS_NEAREST) at /home/kevin/src/blender-git/blender/source/blender/compositor/intern/COM_SocketReader.h:95
2 0x0000000002420c96 in ViewerOperation::executeRegion (this=0x7fffd0007ae0, rect=0x7fffc7873de0, tileNumber=13) at /home/kevin/src/blender-git/blender/source/blender/compositor/operations/COM_ViewerOperation.cpp:103
3 0x00000000023eec37 in CPUDevice::execute (this=0x7fffd0001210, work=0x7fffd000a870) at /home/kevin/src/blender-git/blender/source/blender/compositor/intern/COM_CPUDevice.cpp:33
4 0x00000000023ec1c0 in WorkScheduler::thread_execute_cpu (data=0x7fffd0001210) at /home/kevin/src/blender-git/blender/source/blender/compositor/intern/COM_WorkScheduler.cpp:159
5 0x00000000027b115b in tslot_thread_start (tslot_p=0x7fffd0008788) at /home/kevin/src/blender-git/blender/source/blender/blenlib/intern/threads.c:251
6 0x00007ffff63ce182 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#7 0x00007ffff359d30d in clone () from /lib/x86_64-linux-gnu/libc.so.6

Here's another try: ``` Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffc7874700 (LWP 6240)] ``` 0x00000000024282e9 in MixGlareOperation::executePixelSampled (this=0x7fffd00058b0, output=0x7fffcac99ff8, x=1022, y=620, sampler=COM_PS_NEAREST) ``` at /home/kevin/src/blender-git/blender/source/blender/compositor/operations/COM_MixOperation.cpp:473 ``` 473 output- [x] = mf * max(inputColor1- [x] + value * (inputColor2- [x] - inputColor1- [x]), 0.0f); ``` (gdb) bt ``` #0 0x00000000024282e9 in MixGlareOperation::executePixelSampled (this=0x7fffd00058b0, output=0x7fffcac99ff8, x=1022, y=620, sampler=COM_PS_NEAREST) ``` at /home/kevin/src/blender-git/blender/source/blender/compositor/operations/COM_MixOperation.cpp:473 ``` - 1 0x00000000023f9a45 in SocketReader::readSampled (this=0x7fffd00058b0, result=0x7fffcac99ff8, x=1022, y=620, sampler=COM_PS_NEAREST) at /home/kevin/src/blender-git/blender/source/blender/compositor/intern/COM_SocketReader.h:95 - 2 0x0000000002420c96 in ViewerOperation::executeRegion (this=0x7fffd0007ae0, rect=0x7fffc7873de0, tileNumber=13) at /home/kevin/src/blender-git/blender/source/blender/compositor/operations/COM_ViewerOperation.cpp:103 - 3 0x00000000023eec37 in CPUDevice::execute (this=0x7fffd0001210, work=0x7fffd000a870) at /home/kevin/src/blender-git/blender/source/blender/compositor/intern/COM_CPUDevice.cpp:33 - 4 0x00000000023ec1c0 in WorkScheduler::thread_execute_cpu (data=0x7fffd0001210) at /home/kevin/src/blender-git/blender/source/blender/compositor/intern/COM_WorkScheduler.cpp:159 - 5 0x00000000027b115b in tslot_thread_start (tslot_p=0x7fffd0008788) at /home/kevin/src/blender-git/blender/source/blender/blenlib/intern/threads.c:251 - 6 0x00007ffff63ce182 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #7 0x00007ffff359d30d in clone () from /lib/x86_64-linux-gnu/libc.so.6 ``` ```

Lukas Tönne self-assigned this 2014-07-08 11:38:19 +02:00

Lukas Tönne commented

2014-07-08 11:47:45 +02:00

Own mistake caused by this fix: 78efff5

This will cause simultaneous viewers in the top-level tree and group fight each other for the viewer image and cause a race condition ... Have to revise the way the "active viewer" is defined.

Own mistake caused by this fix: 78efff5 This will cause simultaneous viewers in the top-level tree and group fight each other for the viewer image and cause a race condition ... Have to revise the way the "active viewer" is defined.

blender-admin commented

2014-07-08 12:51:35 +02:00

This issue was referenced by a5902fb276

This issue was referenced by a5902fb276933278bd8db86a9b1938fe649662d8

Lukas Tönne commented

2014-07-08 12:51:55 +02:00

Changed status from 'Open' to: 'Resolved'

Lukas Tönne closed this issue

2014-07-08 12:51:55 +02:00

Lukas Tönne commented

2014-07-08 12:51:55 +02:00

Closed by commit a5902fb276.

Closed by commit a5902fb276.

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compositor: crash on using the viewer node inside of group nodes #40986