When installing devtoolset-4-eclipse-cdt and starting a new
C++ project, if pressing Alt+Enter and attempting to use the
Resources options, several NullPointerException events will occur,
sometimes dialogs will be incorrectly drawn.
Solution appears to be to run:
$ SWT_GTK3=0 scl enable devtoolset-4 'eclipse --launcher.GTK_version 2'
as an adaptation of the solution/workaround at:
[CDT - Project Settings - Build Settings - "The currently displayed page contains invalid values"]
This bug will not be fixed for DTS 4 as it's not supported anymore.
It is fixed in latest SCL (rh-eclipse47 2018.2).