[patch] no-unused-modules: add console message to help debug #2866

Author: ljharb

CHANGELOG.md

@@ -11,6 +11,7 @@ This change log adheres to standards from [Keep a CHANGELOG](https://keepachange
 
 ### Changed
 - [Docs] `no-extraneous-dependencies`: Make glob pattern description more explicit ([#2944], thanks [@mulztob])
+- [`no-unused-modules`]: add console message to help debug [#2866]
 
 ## [2.29.1] - 2023-12-14
 
@@ -1111,6 +1112,7 @@ for info on changes for earlier releases.
 [#2942]: https://github.com/import-js/eslint-plugin-import/pull/2942
 [#2919]: https://github.com/import-js/eslint-plugin-import/pull/2919
 [#2884]: https://github.com/import-js/eslint-plugin-import/pull/2884
+[#2866]: https://github.com/import-js/eslint-plugin-import/pull/2866
 [#2854]: https://github.com/import-js/eslint-plugin-import/pull/2854
 [#2851]: https://github.com/import-js/eslint-plugin-import/pull/2851
 [#2850]: https://github.com/import-js/eslint-plugin-import/pull/2850

src/rules/no-unused-modules.js

@@ -529,6 +529,10 @@ module.exports = {
 
       exports = exportList.get(file);
 
+      if (!exports) {
+        console.error(`file \`${file}\` has no exports. Please update to the latest, and if it still happens, report this on https://github.com/import-js/eslint-plugin-import/issues/2866!`);
+      }
+
       // special case: export * from
       const exportAll = exports.get(EXPORT_ALL_DECLARATION);
       if (typeof exportAll !== 'undefined' && exportedValue !== IMPORT_DEFAULT_SPECIFIER) {