ID 271766 - Mari Displacement causes a shader error with certain node configurations

Problem summary
Mari Displacement causes a shader error when you create certain node chains

Customer reported version
3.2v1
Customer reported platform
Windows 7

Steps to reproduce

1) Create a new Mari project

2) In your Node Graph, create an 'Unreal (shader network)' node

3) Create a 'Cloud' node and plug its output into the displacement port of the Unreal shader.

4) Create a 'Position' node and plug the output into the position port for the cloud node

Workaround
Unknown. 

Reproduced by support
Win 10
w/ Quadro k5000

Win 10
w/ Geforce GTX 1080

CentOS6
w/ Quadro K4200

OSx 10.12
w/ AMD FirePro D700

Expected behaviour
Displacement should be rendered in the viewport

Actual behaviour
A Shader Complie error 'unable to render shader' would appear in the viewport