打字稿編譯器錯誤：「無法獲得屬性‘publicMembers’的值：對象爲空或未定義」

Question

我發現一種情況，我可以可靠地獲得打字稿編譯器失敗，出現錯誤信息：「內部錯誤：無法獲取財產「publicMembers」的值：對象爲null或undefined」

這是我的Repro.ts文件：

interface Callback { (data: any): void; } 

class EventSource1 { 
    addEventHandler(callback: Callback): void { } 
} 

class EventSource2 { 
    onSomeEvent: Callback; 
} 

export class Controller { 
    constructor() { 
     var eventSource = new EventSource1(); 
     // Commenting the next line will allow it to compile. 
     eventSource.addEventHandler(msg => this.handleEventFromSource1(msg)); 
    } 
    private handleEventFromSource1(signalState) { 
     console.log('Handle event from source 1'); 
     var eventSource2 = new EventSource2(); 
     // Commenting the next line will allow it to compile. 
     eventSource2.onSomeEvent = msg => this.handleEventFromSource2(msg); 
    } 
    private handleEventFromSource2(event) { 
     console.log("Handling event from source 2."); 
    } 
} 

這很可能是TypeScript compiler crash: publicMembers is null or undefined重複，但攝製是顯著不那麼複雜，所以我想我會繼續併發布它。

有什麼想法？

Answer 1

我已將此添加到bug over on Codeplex。

如果您還沒有證明它對您也是一個問題，您應該爲該bug投票。這是在編譯器中的錯誤 -

，你是對的，那裏是沒有多少人加入到一個答案。我們只需要等待修復。

Answer 2

對於它的價值，到目前爲止，我已經找到了問題（直到他們解決了編譯器缺陷）最好的解決方法是避免命名的回調接口。換句話說，此代碼的工作就好了：

class EventSource1 { 
    addEventHandler(callback: { (data: any): void; }): void { } 
} 

class EventSource2 { 
    onSomeEvent: { (data: any): void; }; 
} 

class Controller { 
    constructor() { 
     var eventSource = new EventSource1(); 
     eventSource.addEventHandler(msg => this.handleEventFromSource1(msg)); 
    } 
    private handleEventFromSource1(signalState) { 
     console.log('Handle event from source 1'); 
     var eventSource2 = new EventSource2(); 
     eventSource2.onSomeEvent = msg => this.handleEventFromSource2(msg); 
    } 
    private handleEventFromSource2(event) { 
     console.log("Handling event from source 2."); 
    } 
} 

Answer 3

另一種解決方法。聲明void返回類型的方法：

private handleEventFromSource1(signalState): void { ... } 
private handleEventFromSource2(event): void { ... }