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element
    : ...
    ;
catch [RecognitionException re] {
    int ttype = input.get(input.range()).getType();
    // look for anything that really belongs at the start of the rule minus the initial ID
    if ( ttype==COLON || ttype==RETURNS || ttype==CATCH || ttype==FINALLY || ttype==AT ) { 
        RecognitionException missingSemi =
            new v4ParserException("unterminated rule (missing ';') detected at '"+ 
                                  input.LT(1).getText()+" "+input.LT(2).getText()+"'", input);
        reportError(missingSemi);
        throw new ResyncToEndOfRuleBlock();
    }   
    reportError(re);
    recover(input,re);
    retval.tree = (GrammarAST)adaptor.errorNode(input, retval.start, input.LT(-1), re);
}