🐞 Bug report

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Description

Emacs lock files cause an UnhandledPromiseRejectionWarning. The lock file .#filename is actually a symlink pointing nowhere and seems to break the webpack watcher. Also, the lock file is generated once I type anything into the emacs buffer (and not while saving), so there is no point in watching the lock files.

$ npm run start
[...]
chunk {main} main.js, main.js.map (main) 57.7 kB [initial] [rendered]
chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 141 kB [initial] [rendered]
chunk {runtime} runtime.js, runtime.js.map (runtime) 6.15 kB [entry] [rendered]
chunk {styles} styles.js, styles.js.map (styles) 12.9 kB [initial] [rendered]
chunk {vendor} vendor.js, vendor.js.map (vendor) 2.41 MB [initial] [rendered]
Date: 2020-07-23T08:30:17.123Z - Hash: 86e8ae79c0fc07f7c92b - Time: 5696ms
** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **
: Compiled successfully.
(node:3270950) UnhandledPromiseRejectionWarning: Error: ENOENT: no such file or directory, stat '/home/vbraun/myproject/src/.#main.ts'
(node:3270950) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)

Apart from flooding the console with spurious errors the watch&rebuild seems to work

🔬 Minimal Reproduction

$ npx ng new
$ cd myproject
$ npm run start
$ emacs src/main.ts

🌍 Your Environment

$ npx ng version

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

Angular CLI: 10.0.4
Node: 12.16.3
OS: linux x64

Angular: 2.4.10
... compiler, compiler-cli, core
Ivy Workspace: 

Package                      Version
------------------------------------------------------
@angular-devkit/architect    0.1000.4
@angular-devkit/core         10.0.4
@angular-devkit/schematics   10.0.4
@angular/cli                 10.0.4
@angular/tsc-wrapped         0.5.2
@ngtools/json-schema         1.1.0
@ngtools/webpack             1.10.2
@schematics/angular          10.0.4
@schematics/update           0.1000.4
rxjs                         6.5.5
typescript                   2.0.10
webpack                      2.2.0