@angular-devkit/build-angular 12.2.1 unit test failures - TypeError: Cannot read property 'match' of undefined

🐞 Bug report

• new
• build
• serve
• test
• e2e
• generate
• add
• update
• lint
• extract-i18n
• run
• config
• help
• version
• doc

Is this a regression?

No, this was introduced after upgrading from 12.1.4 to 12.2.1

Description

After updating unit test will fail:

Failed: Cannot read property 'match' of undefined
        TypeError: Cannot read property 'match' of undefined
            at extractCommentsWithHash (node_modules/@angular/compiler/fesm2015/compiler.js:9555:1)
            at ShadowCss.shimCssText (node_modules/@angular/compiler/fesm2015/compiler.js:9118:1)
            at node_modules/@angular/compiler/fesm2015/compiler.js:22336:1
            at Array.map (<anonymous>)
            at compileStyles (node_modules/@angular/compiler/fesm2015/compiler.js:22335:1)
            at compileComponentFromMetadata (node_modules/@angular/compiler/fesm2015/compiler.js:21882:1)
            at CompilerFacadeImpl.compileComponentFromMeta (node_modules/@angular/compiler/fesm2015/compiler.js:22492:1)
            at CompilerFacadeImpl.compileComponent (node_modules/@angular/compiler/fesm2015/compiler.js:22482:1)
            at Function.get (node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:27388:1)
            at getComponentDef (node_modules/@angular/core/__ivy_ngcc__/fesm2015/core.js:1108:1)

🌍 Your Environment

Angular CLI: 12.2.1
Node: 14.16.1
Package Manager: npm 7.12.0
OS: darwin x64

Angular: 12.2.1
... animations, cdk, cli, common, compiler, compiler-cli, core
... forms, language-service, platform-browser
... platform-browser-dynamic, platform-server, router
... service-worker

Package                                    Version
--------------------------------------------------------------------
@angular-devkit/architect                  0.1202.1
@angular-devkit/build-angular              12.2.1
@angular-devkit/core                       12.2.1
@angular-devkit/schematics                 12.1.4
@nguniversal/express-engine                12.1.0
@nguniversal/module-map-ngfactory-loader   9.0.0-next.9
@schematics/angular                        12.1.4
rxjs                                       6.6.7
typescript                                 4.3.5

[aidyclarke]

Hey - can anyone let me know what changed? We’ve used CommonJS as a module as part of our tsconfig.spec.json in order to allow Jasmine to spyOn exported functions until now, and this hasn’t been a problem.

Since this feels like something has changed, I’m curious if there is another solution - a fix for one thing is breaking something else.

[alan-agius4]

While in this case you shouldn’t be using CommonJS as module, this seems to be a regression.