user_remap on itself changes users to 0 #51150

New Issue

Lemon Acidjuice · 2017-04-07T18:52:33+02:00

Lemon Acidjuice commented

2017-04-07 18:52:33 +02:00

A minor point. But it has an impact on some cleanup scripts, for instance this one .

Using 'user_remap' on the object itself sometimes changes 'users' to zero.

Here is an example:

> i=bpy.data.images['

                       CrackedSand2.tga']
                       Desertrocku.tga']
                       Desertrocku2.tga']
                       G3_Desert_Rock.tga']
                       G3_PlainSand_02.tga']
                       G3_PlainSand_Blut.tga']
                       G3_PlainSand_Blut2.tga']
                       ROCK6.tga']
                       ROCK6u.tga']
                       SandDunesBig.tga']
                       Untitled']
> i=bpy.data.images['Untitled']
> i.users

1

> i.user_remap(i)
> i.users

1

> i=bpy.data.images['SandDunesBig.tga']
> i.users

1

> i.user_remap(i)
> i.users

0

The behavior seems to be random.

A minor point. But it has an impact on some cleanup scripts, for instance [this one ](http://blender.stackexchange.com/questions/77187/recalculate-image-users-after-user-remap). Using 'user_remap' on the object itself sometimes changes 'users' to zero. Here is an example: ``` > i=bpy.data.images[' CrackedSand2.tga'] Desertrocku.tga'] Desertrocku2.tga'] G3_Desert_Rock.tga'] G3_PlainSand_02.tga'] G3_PlainSand_Blut.tga'] G3_PlainSand_Blut2.tga'] ROCK6.tga'] ROCK6u.tga'] SandDunesBig.tga'] Untitled'] > i=bpy.data.images['Untitled'] > i.users 1 > i.user_remap(i) > i.users 1 > i=bpy.data.images['SandDunesBig.tga'] > i.users 1 > i.user_remap(i) > i.users 0 ``` The behavior seems to be random.

Lemon Acidjuice commented

2017-04-07 18:52:33 +02:00

Changed status to: 'Open'

Lemon Acidjuice commented

2017-04-07 18:52:33 +02:00

Added subscriber: @LemonAcidjuice

Sergey Sharybin commented

2017-04-12 16:28:26 +02:00

Added subscribers: @mont29, @Sergey

Bastien Montagne was assigned by Sergey Sharybin

2017-04-12 16:28:26 +02:00

Sergey Sharybin commented

2017-04-12 16:28:26 +02:00

@mont29, guess this is something for you to check out.

Bastien Montagne commented

2017-04-12 19:59:31 +02:00

I’ll need a file to reproduce this… Also remapping to itself is somewhat stupid, should probably just be an 'early return' case (or even error on it)…

Lemon Acidjuice commented

2017-04-15 09:32:19 +02:00

Test2.blend (same file as the one you can reach from the indicated link in the first post). You can try it with "i=bpy.data.images['ROCK6.tga']" in the Python console.

@mont29 I'm aware this is stupid, but two aspects: non experimented users/coders are lost with this kind of things and this could hide a deeper pointers handling problem (smart pointers, I presume it is, problem may involve memory leaks). FYI, I failed to reproduce it on any of my blend files, and as explained of the first post, the behavior is erratic even in the linked file (so I do not know what the OP of the BSE question have done before he shared his file).

[Test2.blend](https://archive.blender.org/developer/F545977/Test2.blend) (same file as the one you can reach from the indicated link in the first post). You can try it with "i=bpy.data.images['ROCK6.tga']" in the Python console. @mont29 I'm aware this is stupid, but two aspects: non experimented users/coders are lost with this kind of things and this could hide a deeper pointers handling problem (smart pointers, I presume it is, problem may involve memory leaks). FYI, I failed to reproduce it on any of my blend files, and as explained of the first post, the behavior is erratic even in the linked file (so I do not know what the OP of the BSE question have done before he shared his file).

blender-admin commented

2017-04-17 22:33:07 +02:00

This issue was referenced by 4d0d1b5936

This issue was referenced by 4d0d1b5936c59b6e7ce5b3ae8b1af617cbdada61

Bastien Montagne commented

2017-04-17 22:34:49 +02:00

Changed status from 'Open' to: 'Resolved'

Bastien Montagne closed this issue

2017-04-17 22:34:49 +02:00

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user_remap on itself changes users to 0 #51150