Bug report

What is the current behavior?

When using side effect import on an ignored module (or RawModule), the module would always exist in __webpack_modules__ with empty content.

/******/ 	var __webpack_modules__ = ({

/***/ 914:
/***/ (() => {

/* (ignored) */

/***/ })

/* harmony import */ var foo__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(914);

A typical use case for an ignored module is importing a module intended solely for debugging purposes.

For a real-world case, see: lynx-family/lynx-stack#1250

import '@lynx-js/react/debug'

Imports to such ignored modules are expected not to contribute to an increase in bundle size in production.

If the current behavior is a bug, please provide the steps to reproduce.

https://github.com/colinaaa-reproductions/webpack-repro-tree-shaking-raw-module

What is the expected behavior?

The ignored module should be deleted if not used.

Other relevant information:
webpack version: 5.99.9
Node.js version: 22
Operating System: macOS
Additional tools: