ID 270024 - Running isNull() crashes and dumps core as of 3.2v1

Problem summary
Running isNull() crashes and dumps core as of 3.2v1

Customer reported version
3.2v1
Customer reported platform
Fedora

Steps to reproduce

1) Open Mari

2) In the Python console, run the following (where n = any number less than the number of projects you currently have

mari.projects.list()[n].isNull()

3) Mari will then crash and close.


Workaround
Unknown. 

Reproduced by support
Windows 7 - 3.2v1
Linux centOS6 - 3.2v1
MacOS 10.12 - 3.2v1

Regression
Yes
Last working version: 3.1v3

Expected behaviour
Running the command should return a boolean and not crash.

>>> mari.projects.list()[22].isNull()
False

Actual behaviour
On Windows, Mari crashes and shows the crash dialog window. Linux and Mac both crash and dump core without showing crash dialog.