a user reported this via the Gentoo bugzilla ... when
trying to build the ZendEngine2 in php cvs, flex dies:
wget \ 'http://cvs.php.net/viewcvs.cgi/*checkout*/ZendEngine2/./zend_language_scanner.l'
flex -Pzend -S./flex.skl -ozend_language_scanner.c \ -i ./zend_language_scanner.l
flex: fatal internal error, bad line in skeleton file
looks like it's due to the usage of '%*', '%+', and
'%-' in the flex.skl file, but i'm not lex expert and
i'm just guessing at this point :)