ID 524347 - Disabling "Prioritize OCIO Roles" in the preferences then clicking on a Transcode Images or Write Node task in the Export dialog causes a crash

Problem summary
Disabling "Prioritize OCIO Roles" in the preferences then clicking on a Transcode Images or Write Node task in the Export dialog causes a crash.
 
Customer reported version
N/A
 
Customer reported platform
N/A
 
Steps to reproduce
 
1) Open Nuke Studio.
 
2) Navigate to Edit > Preferences > Color Management and uncheck the Prioritize OCIO Roles setting.
 
3) Click OK on the Preferences dialog, then close Nuke Studio.
 
4) Reopen Nuke Studio.
 
5) Import a clip (File > Import File(s)...) and drop it on to the timeline.
 
6) Right click the clip > Export.
 
7) In the Export dialog, select the Transcode Shots DPX preset.
 
8) Click on the Transcode Images task.
 
Alternatively, you can select the Basic Nuke Shot preset and click on the Nuke Write Node task.
 
Expected behaviour
Nuke Studio should not crash when clicking on a Transcode Images or Write Node task in the Export dialog.
 
Actual behaviour
Disabling "Prioritize OCIO Roles" in the preferences then clicking on a Transcode Images or Write Node task in the Export dialog causes a crash.
 
Workaround

If you do not wish to use OCIO Roles, then disabling Allow OCIO Roles in Colorspace Knobs as well as Prioritize OCIO Roles settings should prevent the crash from occurring:

 

 
Reproduced by support
This bug has been reproduced in:
Nuke Studio 13.2v5 - Windows 10 - Linux CentOS 7
Nuke Studio 13.0v1 - Windows 10 - Linux CentOS 7
 
Earliest version tested
Nuke Studio 13.0v1 
- The Prioritize OCIO Roles preference did not exist before this version