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 using and , whether it's by MatRadioModule or by MatRadioButton and MatRadioGroup, the VSCode extension and the compiler pop no error, but the page fails to load.

Reproduction

Couldn't make Stackblitz work, butthat's not the issue

Expected Behavior

it should work

Actual Behavior

The page fails to load (it bails to my project's root for some reason), and pops an error in the browser console :TypeError: can't access property "MatRadioGroup", ɵhmr3 is undefined

Environment

• Angular: 19.1.0
• CDK/Material: 19.2.19
• Browser(s): Firefox Dev Edition 144.0b8
• Operating System (e.g. Windows, macOS, Ubuntu): Windows