Broken CSS Modules when code splitting enabled

[gwer]

What version of Bun is running?

1.2.5+013fdddc6

What platform is your computer?

Linux 6.11.10-300.fc41.x86_64 x86_64

What steps can reproduce the bug?

To reproduce the bug you need to build at least two entrypoints, imported CSS Modules and enabled code splitting.

styles.module.css:

.wrapper {
  display: block;
}

index.ts, index2.ts (they may have the same content):

import styles from './styles.module.css';

console.log(styles);

The build command:

bun build ./index.ts ./index2.ts --outdir ./out --splitting

What is the expected behavior?

Expected output is something like this:

// styles.module.css
var styles_module_default = {
  wrapper: "wrapper_-MSaAA"
};

// index.ts
console.log(styles_module_default);

What do you see instead?

Both entrypoints are build as follows:

// index.ts
console.log(styles_module_default);

The definition of styles_module_default is missing.

Additional information

If there is only one entrypoint or code splitting is disabled, everything works correctly.