全局的未捕获异常

REPL 使用 domain 模块来捕获该 REPL 会话的所有未捕获的异常。

在 REPL 中使用 domain 模块有这些副作用：

• 未捕获的异常仅在独立 REPL 中触发 'uncaughtException' 事件。

• 尝试使用 [process.setExceptionCaptureCallback()][] 会抛出 ERR_DOMAIN_CANNOT_SET_UNCAUGHT_EXCEPTION_CAPTURE 错误。

process.on('uncaughtException', () => console.log('Uncaught'));

throw new Error('foobar');
// Uncaught

process.on('uncaughtException', () => console.log('Uncaught'));
// TypeError [ERR_INVALID_REPL_INPUT]: Listeners for `uncaughtException`
// 

throw new Error('foobar');
// 
// 

The REPL uses the domain module to catch all uncaught exceptions for that REPL session.

This use of the domain module in the REPL has these side effects:

• Uncaught exceptions only emit the 'uncaughtException' event in the standalone REPL. Adding a listener for this event in a REPL within another Node.js program throws ERR_INVALID_REPL_INPUT.
• Trying to use process.setUncaughtExceptionCaptureCallback() throws an ERR_DOMAIN_CANNOT_SET_UNCAUGHT_EXCEPTION_CAPTURE error.

As standalone program:

process.on('uncaughtException', () => console.log('Uncaught'));

throw new Error('foobar');
// Uncaught

When used in another application:

process.on('uncaughtException', () => console.log('Uncaught'));
// TypeError [ERR_INVALID_REPL_INPUT]: Listeners for `uncaughtException`
// cannot be used in the REPL

throw new Error('foobar');
// Thrown:
// Error: foobar