ID 507113 - Nuke crashes when using a Python Custom knob and selecting Edit knobs in the Properties panel.

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Problem summary
Nuke crashes when using a Python Custom knob and selecting Edit knobs in the Properties panel.
 
Customer reported version
n/a
 
Customer reported platform
 n/a


Steps to reproduce
1) Create any node and right-click the Properties panel, select Manage User Knobs.
2) Select Add and then Python Custom, then copy/paste the following script in the the script box: nuke.thisNode()["knobChanged"].setValue(print("test"))
3) Select Done to save/close the User Knob menu, observing performance.
4) Click the Edit knob feature in the Properties panel, observing performance.
 
Expected behavior
Nuke should remain stable and continue loading the Python script.
 
Actual behavior
Nuke crashes after selecting Done or when opening the Edit Knobs menu in the Properties bin.
 
Workaround
There is no available workaround at this time.
 
Reproduced by Support
Nuke 13.1v3 - Windows 10, CentOS 7
Nuke 13.1v2 - Windows 10
Nuke 13.1v1 - Windows 10, CentOS 7 - regression
 
Unable to reproduce bug in:
Nuke 13.0v6 - Windows 10, CentOS 7
 
Earliest version tested
Nuke 13.0v6 - This issue doesn't appear in this version and has regressed
 

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