ID 414087 - Connecting a DeepExpression to a DeepMerge2 can cause Nuke to crash

Problem summary
Connecting a DeepExpression to a DeepMerge2 can cause Nuke to crash.

Customer reported version
Nuke 12.0v1

Customer reported platform
Windows 10

Steps to reproduce

1) Open Nuke and open the attached .nk script. The script contains the following nodes:

 

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The DeepExpression is using the following expressions:

 

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2) Connect the DeepExpression node to the DeepMerge and view the output from the DeepMerge. Nuke should now crash.

Expected behaviour
Nuke shouldn't crash when connecting the DeepExpression node to the DeepMerge.

Actual behaviour
Nuke crashes when connecting the DeepExpression node to the DeepMerge.

Reproduced by support
This bug has been reproduced in:
Nuke 12.0v2 - WIndows 10 - Linux CentOS 7 - macOS 10.13 (High Sierra)
Nuke 12.0v1 - WIndows 10 - Linux CentOS 7 - macOS 10.13 (High Sierra)

Unable to reproduce bug in:
Nuke 11.3v6 - WIndows 10 - Linux CentOS 7 - macOS 10.13 (High Sierra)

Earliest version tested
Nuke 11.3v6
- This issue doesn't appear in this version and has regressed. The DeepMerge2 node also did not exist before Nuke 12.0v1.