NoClassDefFoundError: CUP$ASTPHP5Parser$actions

Posted this a few months ago on dev list, but since it hasn't get any responses, I'm leaving an issue here.

This is an issue specific to Windows. Linux seems to be unaffected.

The problem is that during ant run execution for the PHP Editor module, this file gets deleted:

php/php.editor/build/classes/org/netbeans/modules/php/editor/parser/CUP$ASTPHP5Parser$actions.class

It's not being created again using ant build for the module. A whole full NetBeans build is needed for that. As a result, any change to PHP Editor sources requires a full build to complete.

CUP$ASTPHP5Parser$actions.class is mentioned in php/php.editor/nbproject/project.properties (1):

nbjavac.ignore.missing.enclosing=**/CUP$ASTPHP5Parser$actions.class

And searching for nbjavac.ignore.missing.enclosing reveals two things:

1. No other project.properties than PHP Editor seems to have it
2. It's being used by CustomJavac.java, in cleanUpDependDebris() method (2) that does seem to delete some files and its comments link to an old issue #196556

From what I read, this file is supposed to be skipped from the deletion, but apparently it's not.