bug(Table Schematic Code): Build warning error in the 'table' schematic code

[bradws]

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

When creating a fresh Angular v16.1.0 project, then adding Angular Material to the project, and finally adding the 'table' schematic to produce an example component, the component produces an Angular build warning error in line 20 of the html template stating that the '?.' operator can be replaced with the '.' operator.

Reproduction

StackBlitz link: Build Warning Error
Steps to reproduce:

1. Create a fresh Angular v16.1.0 project:

ng new angular-material-ex2 --standalone

2. Change directory:

cd angular-material-ex2/src/app

3. Add Angular Material:

ng add @angular/material

4. Generate the 'table' schematic:

ng g @angular/material:table MyTable

5. Modify code to accept the newly-created MyTable
   5.1 In app.component.ts file, change code line from:
   imports: [CommonModule],
   ..to..
   imports: [CommonModule, MyTableComponent],
   5.2 In app.component.ts file, after the code line:
   import { CommonModule } from '@angular/common';
   ..put an additional code line..
   import { MyTableComponent } from './my-table/my-table.component';
6. Build the project:

ng run build

7. You will be presented with the Angular build warning error:
   "Warning: src/app/my-table/my-table.component.html:20:29 - warning NG8107: The left side of this optional chain operation does not include 'null' or 'undefined' in its type, therefore the '?.' operator can be replaced with the '.' operator."
   Note: The Stackblitz code sample should show the error
8. To fix, just remove the two Optional Chaining operators; i.e. the two question marks

Expected Behavior

No Build warning error will appear.

Actual Behavior

Code will compile with out any errors.

Environment

• Angular: 16.1.0
• CDK/Material: 16.1.1 / 16.1.1
• Browser(s): Any (Firefox & Chrome)
• Operating System (e.g. Windows, macOS, Ubuntu): Windows 11

[bradws]

I would be happy to contribute to this change after triage.

[andrewseguin]

@crisbeto Is this due to any recent changing in Schematics code?

[crisbeto]

It's due to the new extended template diagnostics coming from the framework. I'll sort it out.