Language service crashes if there is an error during Typecheck block generation

[atscott]

Discovered from #1840 (comment)

Steps to reproduce:

1. In the integration test project, update the library component to use a non-exported host directive:

@Directive({standalone: true})
export class HostBindDirective {
}

@Component({
  selector: 'lib-post',
  template: '{{random}}',
  hostDirectives: [HostBindDirective],
})
export class PostComponent {
  random = Math.random();
}

(Note: also need to update the index.ts to export just PostComponent and PostModule rather than everything from the file.
2. build the integration project (yarn --cwd integration/project build)
3. Open foo.component.html - the language service will crash because the template type check block cannot import the non-exported HostBindDirective

[MTstomachTM]

Hi @atscott,

I'm sorry for commenting on closed issue. But after I update my Angular Language Service to 15.2.1, Angular to 15.2.8, and the component library, Clarity Design, to the latest version that had exported previously unexported directive, the issue persist.

I set angular.trace.server: "verbose", and the last trace before the language service crash is

[UnhandledPromiseRejection: 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(). The promise rejected with the reason "#<FatalDiagnosticError>".] {
  code: 'ERR_UNHANDLED_REJECTION'
}
[Error - 4:11:36 PM] Connection to server got closed. Server will not be restarted.

Is there anything I can provide to help trace the cause?

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}