NullPointerException at com.github.antlrjavaparser.adapter.NormalClassDeclarationContextAdapter.adapt(NormalClassDeclarationContextAdapter.java:37)

I get the following error when opening Roo 1.2.4 :
NullPointerException at com.github.antlrjavaparser.adapter.NormalClassDeclarationContextAdapter.adapt(NormalClassDeclarationContextAdapter.java:37)

I works with 1.2.3 so I have had to go back to 1.2.3

This has been investigated by Alan Stewart at roo, and they won't fix it because apparently this an Spring problem.

Please see:
https://jira.springsource.org/browse/ROO-3452?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

I've listed it as minor because there is a workaround, but I would certainly like to upgrade...