GExperts: access violation in the 64-bit IDE caused by a ToolsAPI declaration

AI;DR – Reproducing this bug and writing this blog post were done mostly by Claude Code. If you don’t want to read “AI slop”, stop reading now. If you have used a GExperts DLL compiled from the sources in the 64-bit IDE of RAD Studio 13, it may have raised an access violation in coreide370.bpl when you opened the GExperts configuration dialog. markbd13 reported this as bug #536 and sent an analysis and a fix with it. Thanks a lot! Which versions are affected The problem was introduced in revision #5593. That revision added a check for keyboard shortcuts that are already used elsewhere, both to the configuration dialog and to the Keyboard Shortcuts window. It was fixed in revision #5853. So only DLLs compiled from revisions #5593 to #5852 are affected, and only in the 64-bit IDE. The official release 1.3.29 is older than revision #5593, so it does not contain this code. The cause To find out which plugin has bound a key, GExperts asks the IDE through the Open Tools API:…