ID 246041 - Project crashes as soon as a selection set is selected

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Problem summary
Mari crashes when selecting one of the selection sets in the below referenced project.
 

Customer reported version
Mari 3.1v3

Customer reported platform
Windows 7
 

Steps to reproduce
1. Open project BelkerAnkiMid.mra (see comment for location)
2. Navigate to selection sets and select one of them.
Notice issue >> Crash. 
 

Workaround
The selection sets will need be recreated to avoid the crash due to them being in a corrupt state within the tested project.

Reproduced by support
Reproduced by QA with 3.1v1 and 3.2.000377b

Expected behaviour
Selecting any of the selection sets in the project should not crash Mari.

Actual behaviour

Selecting a selection set crashes the application.
 

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