Application becomes unresponsive after encountering an exception

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On angular 2 final version, you can implement custom ErrorHandler (Angular 2 docs example):

import {NgModule, ErrorHandler} from '@angular/core';

class MyErrorHandler implements ErrorHandler {
  handleError(error) {
    // do something with the exception
  }
}

@NgModule({
  providers: [{provide: ErrorHandler, useClass: MyErrorHandler}]
})
class MyModule {}

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