是什么导致发生了内部构建错误。编译器中未捕获的异常？

Question

我在我的项目中遇到这个错误，我不知道如何修复它，我以前从未见过它：

java.lang.NullPointerException at macromedia.asc.semantics.ConstantEvaluator.PreprocessDefinitionTypeInfo(ConstantEvaluator.java:3265) at flex2.compiler.as3.As3Compiler.analyze3(As3Compiler.java:701) 1131: Classes must not be nested.

Answer 1

这是由以下语法错误引起的：

public function addDecorator( decorator:IDecorator, subDrawLayer:Sprite ) : void {

    if (subDrawLayer==null) {
        subDrawLayer:Sprite = new Sprite();
    }

    drawLayer.addChild(subDrawLayer);

    decorators.push(decorator);
    subDrawLayers[decorator] = subDrawLayer;
}

具体就是这一行，subDrawLayer:Sprite = new Sprite(); subDrawLayer 变量类型不小心被定义了两次；一次在参数中，然后一次内联在函数中。应该是subDrawLayer = new Sprite();

是什么导致发生了内部构建错误。编译器中未捕获的异常？

What is causing An internal build error has occured. Uncaught Exception in Compiler?

actionscript-3

apache-flex