Macro Tasks left running after failed http requests with Unknown Error, preventing protractor from completing tests

🐞 bug report

Affected Package

@angular/common/http

Is this a regression?

Yes. Worked in @angular/common@9.1.12

Description

A macroTask is left running when certain http errors occur and this prevents protractor for completing since there are tasks left running in the ngZone.

🔬 Minimal Reproduction

https://github.com/wfairclough/AngularHttpMacroTaskMinimalReproduction

Run npm install

Run with npx ng serve

Open Chrome Browser to http://localhost:4200

Reproduce Bug

1. Click Button Make Successful Request and see successul response.
2. Click Button Check Task Counts and see the open micro and macro task counts in the ngZone.
3. Click Button Make Failed Request and see the error response.
4. Click Button Check Task Counts again and notice that the macroTask count is now 1.
5. Repeat failed requests as many times as you like and the marcroTask count will just keep increasing.

🔥 Exception or Error

No macroTasks should be left running after this failed http request.

🌍 Your Environment

Angular Version:

     _                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/
    

Angular CLI: 10.1.0
Node: 10.20.1
OS: linux x64

Angular: 10.1.1
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Ivy Workspace: Yes

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.1001.0
@angular-devkit/build-angular     0.1001.0
@angular-devkit/build-optimizer   0.1001.0
@angular-devkit/build-webpack     0.1001.0
@angular-devkit/core              10.1.0
@angular-devkit/schematics        10.1.0
@angular/cli                      10.1.0
@ngtools/webpack                  10.1.0
@schematics/angular               10.1.0
@schematics/update                0.1001.0
rxjs                              6.6.3
typescript                        4.0.2
webpack                           4.44.1

Anything else relevant? Error occurs in both browsers I tested with Chrome and Firefox.

[JiaLiPassion]

@JoostK , sure, I just checked this one, I think this can be handled inside zone.js, it is a bug about integrated zone.js with @angular/common/http, I will fix it.

[angular-automatic-lock-bot[bot]]

This issue has been automatically locked due to inactivity. Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}