Angular Language Service ngcc error in VSCode 1.62.1 and above

Which @angular/* package(s) are the source of the bug?

language-service

Is this a regression?

Yes

Description

I’ve upgraded to Angular 12 and I’ve installed the latest 12.x version VSIX of @angular/language-service extension in VSCode. But I get a popup error in the bottom right corner.

Angular extension might not work correctly because ngcc operation failed. Try to invoke ngcc manually by running 'npm/yarn run ngcc'. Please see the extension output for more information.

Please provide a link to a minimal reproduction of the bug

No response

Please provide the exception or error you saw

This is the OUTPUT:
[Info  - 7:04:14 AM] Angular language server process ID: 34020
[Info  - 7:04:14 AM] Using typescript/lib/tsserverlibrary v4.3.5 from /Users/jyoutsey/src/myorg/ng/node_modules/typescript/lib/tsserverlibrary.js
[Info  - 7:04:14 AM] Using @angular/language-service v12.2.12 from /Users/jyoutsey/.vscode/extensions/angular.ng-template-12.2.3/node_modules/@angular/language-service/index.js
[Info  - 7:04:14 AM] Logging is turned off. To enable, run command 'Open Angular server log'.
[Error - 7:04:39 AM] Failed to run ngcc for /Users/jyoutsey/src/myorg/ng/tsconfig.json, language service may not operate correctly:
    ngcc for /Users/jyoutsey/src/myorg/ng/tsconfig.json returned exit code null, stderr: 
[Info  - 7:04:39 AM] Enabling Ivy language service for /Users/jyoutsey/src/myorg/ng/tsconfig.json.

Please provide the environment you discovered this bug in

Angular CLI: 12.2.13
Node: 14.15.1
Package Manager: npm 6.14.11
OS: darwin x64

Angular: 12.2.13
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router, service-worker

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.1202.13
@angular-devkit/build-angular      12.2.13
@angular-devkit/core               12.2.13
@angular-devkit/schematics         12.2.13
@angular/cdk                       12.2.12
@angular/material                  12.2.12
@angular/material-moment-adapter   12.2.12
@schematics/angular                12.2.13
rxjs                               7.4.0
typescript                         4.3.5

Anything else?

I’ve uninstalled the extension, restarted VSCode, and installed it again, to no avail.

[atscott]

Closing as resolved in the 1.62.3 release of VSCode.

[atscott]

@RobertAKARobin The fix was included in their latest insider version release but I’ve been leaving this open for visibility until their recovery release this week (1.62.3 I believe). There’s nothing to be done on our end since it was a bug in VSCode.