TypeError: Cannot set properties of null (setting '...'), when using markAsUsed comments

[tiwariav]

The issue is in the version 2.12.0, works fine for 2.11.4

[yuhsianw]

Hi @tiwariav , thanks for reporting this. Can you please provide the reproduce steps for the issue following this example:

Repro Code

import s from './animationName.scss';

export default Foo = () => (
  <div>
    <div className={s.someAnimation}></div>
  </div>
);

@keyframes someAnimation {}

ESLint Config

{
  "plugins": ["css-modules"],
  "extends": ["plugin:css-modules/recommended"]
}

Expected Result

Expected no errors

Actual Result

Received error:

Class or exported property 'someAnimation' not found

[yuhsianw]

Template for above:

### Repro Code
```javascript
import s from './animationName.scss';

export default Foo = () => (
  <div>
    <div className={s.someAnimation}></div>
  </div>
);
```
```css
@keyframes someAnimation {}
```

### ESLint Config
```json
{
  "plugins": ["css-modules"],
  "extends": ["plugin:css-modules/recommended"]
}
```

### Expected Result
Expected no errors

### Actual Result
Received error:
```
Class or exported property 'someAnimation' not found
```

[tiwariav]

Repro Code

/* eslint css-modules/no-unused-class: [2, {camelCase: true, markAsUsed:
  ['nested']
}] */
import styles from './styles.scss';

export default Foo = () => (
  <div className={styles.root}>
    <div className={styles.nested}></div>
  </div>
);

.root {
  color: green;
  & .nested {
    color: red;
  }
}

ESLint Config

{
  "plugins": ["css-modules"],
  "rules": {
    "css-modules/no-undef-class": ["warn", { "camelCase": true }],
    "css-modules/no-unused-class": ["error", { "camelCase": true }],
  }
}

Expected Result

Expected no errors

Actual Result

Received error:

TypeError: Cannot set properties of null (setting 'nested')

Can check here as well.
https://codesandbox.io/p/sandbox/brave-mopsa-ycnv8f?file=%2Fsrc%2Findex.tsx%3A6%2C1

[tiwariav]

From what I have tried, its only giving error if using nested classes. Although the same works fine with previous version.