bug(@angular/material/core): CanUpdateErrorState and mixinErrorState are removed

[DerBasler]

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

18

Description

Disclaimer: I am not sure if this is a bug or just needs some documentation. (I could not find anything about this in the recent changelog)

@angular/material/core used to export CanUpdateErrorState and mixinErrorState which it does not anymore.

I can see it getting deprecated here: DerBasler@94306f3#diff-606a332883a0dda9b5ef3fa3473ab14ab59820c71ae2b04f801ec4d1d4e0ccb4R85

and removed here: DerBasler@5b8d8c3

But there is no mention in the changelog that I could find and no example how to migrate this.

I will post my findings here once I know more.

Reproduction

StackBlitz link:
Steps to reproduce:
1.
2.

Expected Behavior

Preferably would be some automatic migration in the cli otherwise a checkpoint in the migration checklist from 18 to 19

Actual Behavior

Build fails

Environment

• Angular: 19.0.6
• CDK/Material: 19.0.4
• Browser(s): - (fails to build)
• Operating System: Windows

[DerBasler]

A migration example: DerBasler@6ef5959