Missing stack trace on node.js uncaughtException thrown by throw ()

Question

I am trying to catch a stack trace of a node.js uncaughtException and works fine for various errors, but not for throw () statements:

Fix stack trace when handling exceptions:

$ cat errorFunc.js process.on('uncaughtException', function(exception) { console.log('uncaughtException occurred: ' + exception.stack); }); MyError(); $ node errorFunc.js uncaughtException occurred: ReferenceError: MyError is not defined at Object.<anonymous> (/home/jolcese/code/WebEnclaves/Server/errorFunc.js:5:1) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Function.Module.runMain (module.js:497:10) at startup (node.js:119:16) at node.js:901:3 $ 

No stack trace on exception thrown by throw ():

 $ cat errorThrow.js process.on('uncaughtException', function(exception) { console.log('uncaughtException occurred: ' + exception.stack); }); throw('my error'); $ node errorThrow.js uncaughtException occurred: undefined $ 

Any idea why?

Thanks jose

Disclaimer: I know that using process.on ('uncaughtException') is very, very bad, and I will be punished, but using domains in this code is not an option.

Answer 1

JavaScript allows you to throw something.

If you want to throw stacked trace errors in JavaScript, you need to throw Error objects. (specification)

In addition, throw is an operator, not a function.

Try

 throw new Error('my error'); 

See the Mozilla Developer Network guide for more information.