{"id":40615,"date":"2026-06-02T00:54:28","date_gmt":"2026-06-01T21:54:28","guid":{"rendered":"https:\/\/vpesports.com\/minecraft\/mods\/class-loader-fixer\/"},"modified":"2026-06-02T00:54:28","modified_gmt":"2026-06-01T21:54:28","slug":"class-loader-fixer","status":"publish","type":"mod","link":"https:\/\/vpesports.com\/minecraft\/mods\/class-loader-fixer\/","title":{"rendered":"Class Loader Fixer"},"content":{"rendered":"<p>## Summary<\/p>\n<p>This mod fixes the Class Loader in legacy versions of Minecraft.<\/p>\n<p>## Details<\/p>\n<p>This is a simple **jar-mod** which adds the `CodeSource` to each loaded class in FML.<br \/>\nThat is actually everything this mod does (well, besides fixing a few more bugs on even older versions of Forge).<br \/>\nThis mod just ships a backported `RelaunchClassLoader` which overwrites the built-in version (from FML) and allows mods to read the file source of classes.<\/p>\n<p>### Why is this needed in some cases?<\/p>\n<p>For example, Block Helper is able to show you in the item tooltips which mod a given item is from.<br \/>\nThis procedure relies on the `CodeSource` object of the `ProtectionDomain`s of the loaded classes.<br \/>\nOld versions of FML do not set this `CodeSource`, which leads Block Helper into thinking that everything is a Vanilla item.<\/p>\n<p>## Installation<\/p>\n<p>### As a ModLoaderMP \/ Forge mod<\/p>\n<p>This mod needs to be installed as a **jar-mod**. That means, you have to&#8230;<br \/>\n1. Be sure to back up your `minecraft.jar`!<br \/>\n2. Extract the content of the mod zip into the `minecraft.jar` file<br \/>\n3. Delete the `META-INF` folder in there<br \/>\n4. Overwrite any existing files when doing so!<br \/>\n5. ???<br \/>\n6. Profit!<\/p>\n<p>### As a Fabric mod<\/p>\n<p>I do not have any Fabric versions available. However, the fix is incorporated directly into Fabricated Legacy Forge. Hence, you do not need to install it separately!<\/p>\n<p>## Unsupported mods<\/p>\n<p>&#8211; ObsidiPlates 1.4.2 was incompatible with v1. This is fixed in v2.<\/p>\n<p>Please let me know about any incompatibilities! \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fixes the Class Loader in legacy Minecraft Forge<\/p>\n","protected":false},"featured_media":40616,"template":"","meta":{"_minecraft_slug":"class-loader-fixer","_minecraft_project_id":"ogIYwD2F","_minecraft_author":"HyperSpeeed","_minecraft_license":"MIT","_minecraft_downloads":735,"_minecraft_follows":0,"_minecraft_client_side":"required","_minecraft_server_side":"unsupported","_minecraft_storage_type":"zip","_minecraft_archive_name":"class-loader-fixer.zip","_minecraft_size_bytes":36536,"_minecraft_version_count":7,"_minecraft_updated_at":"2026-05-15T22:53:21.832900Z","_minecraft_date_created":"2022-02-11T23:05:12.480928Z","_minecraft_date_modified":"2024-07-04T15:19:29.410488Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/class-loader-fixer","_minecraft_icon_attachment_id":40616,"_minecraft_imported_at":"2026-06-01T21:54:28+00:00","_minecraft_import_hash":"72595658d223829c6b7be0a90b31b33b","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[104,873,90,92],"mod_loader":[106],"minecraft_version":[852,853,958,959,854,960,855,856],"class_list":["post-40615","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-forge","mod_category-library","mod_category-optimization","mod_category-utility","mod_loader-forge","minecraft_version-1-3-1","minecraft_version-1-3-2","minecraft_version-1-4","minecraft_version-1-4-1","minecraft_version-1-4-2","minecraft_version-1-4-3","minecraft_version-1-4-4","minecraft_version-1-4-5"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - 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