ID 426284 - A crash occurs when the DeepMerge node references a custom channel in the Read node.

Problem summary

A crash occurs when the DeepMerge node references a custom channel in the Read node.

Customer reported version
nuke.12.0v4

Customer reported platform
windows10

Steps to reproduce

1) From Nuke, load the attached script.

2) Locate the Write node and press 1 on the keyboard to view it.

3) Observe the Viewer performance in Nuke.

Expected behavior
The Viewer should be displayed with the rendered image.

Actual behavior
Nuke crashes and gives an error report.

Workaround
There is no available workaround at this time.

Reproduced by devs.
Nuke 12.0v4 - Windows 10

Unable to reproduce bug in:

Nuke 12.0v4 - Windows 7

Earliest version tested
 Nuke 12.0v1 - This issue doesn't appear in this version and has regressed