Material: autocomplete: SyntaxError: Invalid regular expression when typing (

[Nickproger]

Bug, enhancement request, or proposal

Bug

Demo and steps to reproduce the issue

Demo URL (required)*:
https://material.angularjs.org/latest/demo/autocomplete

Detailed Reproduction Steps

1. input into Autocomplete the char (
2. check browser console

Explain the expected behavior

No errors is Browser Console.

Explain the current behavior

Error in Browser Console:

SyntaxError: Invalid regular expression: /^test (/: Unterminated group
    at new RegExp (<anonymous>)
    at ee.createRegex (angular-material.min.js:7)
    at ee.onRender (angular-material.min.js:7)
    at m.$digest (angular.js:19143)
    at b.$apply (angular.js:19503)
    at Object.$$debounceViewValueCommit (angular.js:30903)
    at Object.$setViewValue (angular.js:30877)
    at HTMLInputElement.l (angular.js:26518)
    at sg (angular.js:3826)
    at HTMLInputElement.d (angular.js:3814)

List the affected versions of AngularJS, Material, OS, and browsers

• AngularJS: 1.7.9
• AngularJS Material: 1.1.22 (1.1.21 - no bug)
• OS: Windows 10
• Browsers: Chrome

Add anything else we should know

This bug appeared after upgrade from v1.1.21 to v1.1.22

Screenshots

[Splaktar]

Thank you for this report! I can reproduce this on the docs and locally. The regression was caused by PR https://github.com/angular/material/pull/11855. @psamim you may be interested in this. Hopefully I can fix it quickly and easily.

Investigating...

[Splaktar]

Opened PR https://github.com/angular/material/pull/11911 to fix tihs.