Object.Parents returns wrong information when multiple links exist to the same document

[abetis]

Hi.
Please see the attached example file:
asm_tuto2.zip

Using Assembly4.
There are 2 "arm" links in the assembly: arm001 and arm2
Expand both arm's entries in the tree view.
Right click on arm001.Body002 in the tree, select "Send to python console".
In the console run "obj.Parents", the result will be:
[(<Part object>, '**arm2.Body002**.'), (<Part object>, 'Body002.')]
Right click on arm2.Body002 in the tree, select "Send to python console".
In the console run "obj.Parents", the result will be:
[(<Part object>, 'arm2.Body002.'), (<Part object>, 'Body002.')]

OS: Ubuntu 18.04.5 LTS (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.22517 (Git)
Build type: Unknown
Branch: gui-command-enhancements
Hash: 7616153
Python version: 3.6.9
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)

[abetis]

Is it related to #42 ?

[realthunder]

I'll submit a PR to upstream later. You can manually apply the commit and try.