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Changes will no longer be recognized if you remove and re-add same component #28956

Open
@dariosko

Description

Command

serve

Is this a regression?

  • Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

Changes will no longer be recognized if you remove and re-add same component.

Minimal Reproduction

Removing and re-adding the import of the component (import { TestComponent } from ‘./test/test.component’), the component in the imports array and in the template (<app-test>) leads to that no further changes to this component are recognized.

Image

Repro App V18

Problem also in V19

Exception or Error

Your Environment

**v18 Reproduction environment:**
Angular CLI: 18.2.12
Node: 18.20.3
Package Manager: npm 10.2.3
OS: linux x64
Angular: 18.2.12
... animations, build, cli, common, compiler, compiler-cli, core
... forms, platform-browser, router
Package Version
------------------------------------------------------
@angular-devkit/architect 0.1802.12
@angular-devkit/core 18.2.12 (cli-only)
@angular-devkit/schematics 18.2.12
@schematics/angular 18.2.12
rxjs 7.8.1
typescript 5.5.4
zone.js 0.14.10
**v19 Reproduction environment:**
Angular CLI: 19.0.0
Node: 18.20.3
Package Manager: npm 10.2.3
OS: linux x64
Angular: 19.0.0
... animations, build, cli, common, compiler, compiler-cli, core
... forms, platform-browser, router
Package Version
------------------------------------------------------
@angular-devkit/architect 0.1900.0
@angular-devkit/core 19.0.0
@angular-devkit/schematics 19.0.0
@schematics/angular 19.0.0
rxjs 7.8.1
typescript 5.6.3
zone.js 0.15.0

Anything else relevant?

After clearing the Angular cache with ng cache clean and restarting the dev server with ng serve it works again.
So probably a caching bug.

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