ID 226244 - Nuke crashes with two Defocuses on a high thread count machine

Problem summary
Nuke crashes if a Defocus follows a ZDefocus on a high thread count machine.

Customer reported version
nuke.10.0v1

Customer reported platform
centos6

Steps to reproduce

1) Open the attached Nuke script on a machine with 30+ threads

2) Enable the disabled Zdefocus node, Nuke will crash

If the threads are limited to 28, then it appears to be stable. However different machines seemed to have different max number of threads which could be used before Nuke would be come unstable.

Reproduced by support
The problem has been reproduced on:

Nuke 10.0v1 - CentOS 6.7 - Windows 10

Nuke 9.0v8 - CentOS 6.7 - Windows 10

Nuke 9.0v7 - CentOS 6.7 

Nuke 9.0v1 - CentOS 6.7 

It was stable on:

Nuke 8.0v6 - CentOS 6.7 - Windows 10

Expected behaviour
For Nuke to not crash

Actual behaviour
Nuke crashed