App Crash on Launch - Entry Point Not Found in Debug Dylib I'm experiencing a crash when launching my widget app, and I'm hoping someone can help me figure out what's going on. It #1 0x00000001fce533bc in pthread_kill () #2 0x0000000196dc7524 in abort () #3 0x00000001025c94f0 in abort_swift_entry_main_entry_point_not_found___debug_dylib () #4 0x00000001025c9a48 in lookupMainFuncAddressInDebugDylibMachHeader () #5 0x00000001025c9bf4 in __debug_dylib_swift_extension_entry_trampoline () #6 0x00000001d3990214 in -[EXSwiftUI_Subsystem init] () #7 0x00000001d3990798 in __37+[EXSwiftUI_Subsystem sharedInstance]_block_invoke () #8 0x000000018b91ca30 in _dispatch_client_callout () #9 0x000000018b91e2b0 in _dispatch_once_callout () #10 0x00000001d3989a94 in +[EXSwiftUI_Subsystem sharedInstance] () #11 0x00000001c6b2b0c4 in __PLUGINKIT_CALLING_OUT_TO_CLIENT_SUBSYSTEM_FOR_INIT__ () #12 0x00000001c6b42ab0 in ___lldb_unnamed_symbol912 () #13 0x00000001c6b2eae8 in ___lldb_unnamed_symbol492 () #14 0x00000001c6b2a450 in ___lldb_unnamed_symbol441 () #15 0x00000001c6b421c8 in ___lldb_unnamed_symbol906 () #16 0x00000001c6b2b33c in ___lldb_unnamed_symbol449 () #17 0x00000001c6b2a2e8 in ___lldb_unnamed_symbol438 () #18 0x00000001d3987d10 in EXExtensionMain () #19 0x000000018d4d9ebc in NSExtensionMain () 2024-11-06 11:57:06.650900+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Looking up debug dylib relative path 2024-11-06 11:57:06.651655+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Found debug dylib relative path string `WidgetTest.debug.dylib` 2024-11-06 11:57:06.651678+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Looking up debug dylib entry point name 2024-11-06 11:57:06.651683+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] No debug dylib entry point name defined. 2024-11-06 11:57:06.651687+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Looking up debug dylib install name 2024-11-06 11:57:06.651692+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Found debug dylib install name string `@rpath/WidgetTest.debug.dylib` 2024-11-06 11:57:06.651700+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Looking for Previews JIT link entry point. 2024-11-06 11:57:06.651910+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] No Previews JIT entry point found. 2024-11-06 11:57:06.651920+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Gave PreviewsInjection a chance to run and it returned, continuing with debug dylib. 2024-11-06 11:57:06.651923+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Looking for main entry point. 2024-11-06 11:57:06.651925+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Opening debug dylib with '@rpath/WidgetTest.debug.dylib' 2024-11-06 11:57:06.651935+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Debug dylib handle: 0x2056a54c0 2024-11-06 11:57:06.651938+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] No entry point found. Checking for alias. 2024-11-06 11:57:06.651940+0900 WidgetTest[582:19000] [PreviewsAgentExecutorLibrary] Calling provided entry point. The app crashes immediately upon launch. The crash appears to be related to __debug_dylib_swift_extension_entry_trampoline. The logs indicate that PreviewsAgentExecutorLibrary cannot find the debug dylib entry point. Specific messages include: "No debug dylib entry point name defined." "No entry point found. Checking for alias." Additional Details: The crash seems to be happening during the initialization of EXSwiftUI_Subsystem. The function abort_swift_entry_main_entry_point_not_found___debug_dylib suggests that the main entry point in the debug dylib is missing. The app uses SwiftUI and includes a widget extension. The issue persists even after disabling SwiftUI Previews and cleaning the build. **Notably, like others have reported, this issue only occurs when using Xcode 16, and it only happens on devices running iOS 15. **