ID 305643 - Certain combinations of nodes within gizmos crash Mari 3.3v1 on project open

Problem summary
Certain combinations of nodes within gizmos crash Mari 3.3v1 on project open

Customer reported version
3.3v1
Customer reported platform
Windows 10
Steps to reproduce

1) Create a simple gizmo consisting of 6x Bottom Transparency and 6x merge nodes and export as .MNG
2) Place the .MNG file into your Mari > Gizmos Directory.

3) Launch Mari.

4) Mari should launch as usual.

5) Try to open any project, such as Example Head.

6) Mari will behave as though it is loading the project but crash before the project opens.

Workaround
Unknown.

Reproduced by support
3.3v1 - Windows 10, OSX 10.12, CentOS6

Earliest version tested
Regression, 3.2v1

Expected behaviour
Mari should be able to launch with gizmos in the Gizmo directory with no issues.

Actual behaviour
If the Gizmo contains above a undefined amount of nodes, Mari will crash on project open, regardless of the project.