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: https://bugs.eclipse.org/bugs/show_bug.cgi?id=492071 [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).