babel-node未显示错误

Question

I'm not sure why, but I just ran into a situation in which an object was undefined and I tried to call a property on that object. What happend was nothing, except that the console seems to be hanging (no more console message were printed). Now, I run my ES2015 program as follows

$> ./node_modules/.bin/babel-node ./my-app

Is this a known issue with babel, is could this be something else ?

Answer 1

You need to add an unhandledRejection handler.

process.on('unhandledRejection', function(err){
    console.log(err.stack);
    process.exit(1);
});

otherwise Node's default Promise implementation will silently swallow reject calls to promises without .catch handlers.