Impress 5.3 fatal error trying to edit master slide

[rbwallis]

This is a 100% failure.

[amycsj]

Same problem.

How reproducible:
every time

Steps to Reproduce:

1. Open LibreOffice Impress
2. Open right panel, select “Masters” (might be different in english, I am using the french version so "Pages Maîtresses)
3. Right click on one of the masters and hit “edit master”

Actual results:
crash

LIbreOffice Version: 5.3.2.2
Build ID: 1:5.3.2~rc2-0ubuntu1~xenial0
CPU Threads: 4; OS Version: Linux 4.4; UI Render: default; VCL: gtk2; Layout Engine: new;
Locale: en-US (en_US.UTF-8); Calc: group

Ubuntu MATE 16.04

[Grantler]

Same on LO 5.4.1.2 on LinuxMint 18.2-64 Mate