CodeGenerator.initSymbols() is doing a destructive iteration over the list it gets. That's unnecessary. Should be rewritten as:

    private void initSymbols(final LinkedList<Symbol> symbols, final Type type) {
        final Iterator<Symbol> it = symbols.iterator();
        if(it.hasNext()) {
            method.loadUndefined(type);
            boolean hasNext;
            do {
                final Symbol symbol = it.next();
                hasNext = it.hasNext();
                if(hasNext) {
                    method.dup();
                }
                method.store(symbol, type);
            } while(hasNext);
        }
    }