extra info generated by crash report:
```
GNU Image Manipulation Program version 2.10.8
git-describe: GIMP_2_10_6-294-ga967e8d2c2
C compiler:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=n
Public bug reported:
OS version: Ubuntu 19.04
GIMP version: 2.10.8-2
Expected: icon size enlarges
What happened: crash of GIMP (image recoverable after re-opening GIMP)
Method to reproduce:
- Open Gimp
- Go to Preferences
- Choose icon theme "colour"
- try to enlarge the icon size
After re-open