ID 217000 - 3.1v1 Snapshot Revert causes Mari to crash

Problem summary
Creating a snapshot in 3.1v1 causes Mari to crash, this is a regression and is working in from 2.6v5 to 3.0v1 
Provided logs below

Customer reported version
3.1v1

Customer reported platform
MacOSX

Steps to reproduce

1) Create a new project with a piece of geometry

2) Go to Channels, right click on the diffuse channel and select 'Snapshot' and snapshot the channel

3) After this, bake down some new paint strokes

 

4) Go to Snapshot>Revert to the previous snapshot

5) Mari Crashes

Reproduced by support
Reporoduced on MacOSX El Capitan 10.11 for Mari 3.0v3, 3.1v1 

Regression from 3.0v1

Expected behaviour
For the snapshot to revert my work to a previous state

Actual behaviour
Mari crashed