Unknown directive error inside ng-template or structural directive not detected with fullTemplateTypeCheck disabled #47601

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

compiler

Is this a regression?

Yes

Description

I have a project where fullTemplateTypeCheck is disabled and FormsModule was accidentally dropped from imports.

Angular compiler did not complain NG8002: Can't bind to 'ngModel' since it isn't a known property errors. It turned out that all of our ngModel usage were either inside ng-template or conditioned with *ngIf. Removing *ngIfs for one of them recovered error detection for that element.

I recall Angular used to complain such issues anywhere upon AoT build, before the Ivy switch.

Please provide a link to a minimal reproduction of the bug

• "fullTemplateTypeCheck: false" in tsconfig.json
• remove FormsModule from NgModule's imports

error not detected (inside ng-template):

<ng-template>
  <!-- ... -->
  <input [(ngModel)]="name">
  <!-- ... -->
</ng-template>

error not detected (inside structural directive):

<div *ngIf="editing">
  <!-- ... -->
  <input [(ngModel)]="name">
  <!-- ... -->
</div >

Please provide the exception or error you saw

No response

Please provide the environment you discovered this bug in (run ng version)

Angular CLI: 13.3.7
Node: 14.19.1
Package Manager: npm 7.20.3
OS: darwin x64

Angular: 13.3.11
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1303.7
@angular-devkit/build-angular   13.3.7
@angular-devkit/core            13.3.7
@angular-devkit/schematics      13.3.7
@angular/cdk                    13.3.9
@angular/cli                    13.3.7
@angular/fire                   7.4.1
@schematics/angular             13.3.7
rxjs                            6.6.7
typescript                      4.6.4
webpack                         5.73.0

Anything else?

Probably related to #36171.