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I'm getting this error: Abnormal number of gesture recognizer dependencies: 700. System performance may be affected. Please investigate reducing gesture recognizers and/or their dependencies. It's caused by a view that loads a project and queries a favorite model for a project. I use this data to determine which system image to show. Here's my model: import Foundation import SwiftData @Model final class FavoriteModel { @Attribute(.unique) var id: UUID = UUID() @Attribute var createdDate: Date @Relationship var project: Project init(createdDate: Date = .now) { self.createdDate = createdDate } } Here's the init for my view: @Query var favorites: [FavoriteModel] init(project: Project?) { self.project = project guard let projectID = project?.id else { return } let filter = #Predicate<FavoriteModel> { $0.project.id == projectID } _favorites = Query(filter: filter, sort: \FavoriteModel.createdDate) } Here's the code that is responsible for the error: Button { //favorite } label: { if favorites.isEmpty { Image(systemName: "heart") } else { Image(systemName: "heart.fill") } } If I remove "favorite.isEmpty", the error disappears when I press the button. This use to work in Xcode 15 beta 4. Is anyone else seeing this? It looks like a bug, but there's also probably a better solution. Thanks,

Anyone else experience this? I'm getting constant crashes (every 20 minutes). Luckily, Xcode remembers my window configuration, but it's getting annoying. Xcode.sourcecontrol.git is always the culprit, but I get this error code: 0x00000004 (no mapping for user data write)Thoughts?The Xcode crash report is here:Process: Xcode [682] Path: /Applications/Xcode.app/Contents/MacOS/Xcode Identifier: com.apple.dt.Xcode Version: 11.0 (14936) Build Info: IDEFrameworks-14936000000000000~3 (11A420a) App Item ID: 497799835 App External ID: 832762837 Code Type: X86-64 (Native) Parent Process: ??? [1] Responsible: Xcode [682] User ID: 501 Date/Time: 2019-10-04 16:58:04.881 -0700 OS Version: Mac OS X 10.15 (19A578c) Report Version: 12 Bridge OS Version: 4.0 (17P50569a) Anonymous UUID: 0255E2D9-08EF-49B0-6576-BB197FEB1C38 Time Awake Since Boot: 1400 seconds System Integrity Protection: enabled Crashed Thread: 18 Dispatch queue: com.apple.NSXPCConnection.user.com.apple.dt.Xcode.sourcecontrol.Git Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000020 Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [682] VM Regions Near 0x20: --&gt; __TEXT 0000000103a3f000-0000000103a42000 [ 12K] r-x/r-x SM=COW /Applications/Xcode.app/Contents/MacOS/Xcode Application Specific Information: ProductBuildVersion: 11A420a œ„såˇˇ Thread 0:: Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff312ad19b __CFRunLoopServiceMachPort + 322 3 com.apple.CoreFoundation 0x00007fff312ac737 __CFRunLoopRun + 1695 4 com.apple.CoreFoundation 0x00007fff312abe13 CFRunLoopRunSpecific + 499 5 com.apple.HIToolbox 0x00007fff2fe38b2d RunCurrentEventLoopInMode + 292 6 com.apple.HIToolbox 0x00007fff2fe3886d ReceiveNextEventCommon + 600 7 com.apple.HIToolbox 0x00007fff2fe385f7 _BlockUntilNextEventMatchingListInModeWithFilter + 64 8 com.apple.AppKit 0x00007fff2e4e1c34 _DPSNextEvent + 990 9 com.apple.AppKit 0x00007fff2e4e09a4 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352 10 com.apple.dt.DVTKit 0x000000010436509b -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 390 11 com.apple.AppKit 0x00007fff2e4db144 -[NSApplication run] + 658 12 com.apple.AppKit 0x00007fff2e4ccfed NSApplicationMain + 777 13 com.apple.dt.Xcode 0x0000000103a40efd main + 541 14 libdyld.dylib 0x00007fff684ac405 start + 1 Thread 1: 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff312ad19b __CFRunLoopServiceMachPort + 322 3 com.apple.CoreFoundation 0x00007fff312ac737 __CFRunLoopRun + 1695 4 com.apple.CoreFoundation 0x00007fff312abe13 CFRunLoopRunSpecific + 499 5 com.apple.Foundation 0x00007fff33946cad -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212 6 com.apple.DTDeviceKitBase 0x000000011c5c3dae +[DTDKRemoteDeviceConnection startServiceBrowsers] + 204 7 com.apple.Foundation 0x00007fff3393cef2 __NSThread__start__ + 1064 8 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 9 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 2: 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff312ad19b __CFRunLoopServiceMachPort + 322 3 com.apple.CoreFoundation 0x00007fff312ac737 __CFRunLoopRun + 1695 4 com.apple.CoreFoundation 0x00007fff312abe13 CFRunLoopRunSpecific + 499 5 com.apple.Foundation 0x00007fff33946cad -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212 6 com.apple.DTDeviceKitBase 0x000000011c5d18dd -[DTDKRemoteDeviceDataListener listenerThreadImplementation] + 636 7 com.apple.Foundation 0x00007fff3393cef2 __NSThread__start__ + 1064 8 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 9 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 3:: com.apple.CFSocket.private 0 libsystem_kernel.dylib 0x00007fff685fc7c6 __select + 10 1 com.apple.CoreFoundation 0x00007fff312da92a __CFSocketManager + 632 2 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 3 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 4:: JavaScriptCore bmalloc scavenger 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 libc++.1.dylib 0x00007fff655fd941 std::__1::condition_variable::__do_timed_wait(std::__1::unique_lock&lt;std::__1::mutex&gt;&amp;, std::__1::chrono::time_point&lt;std::__1::chrono::system_clock, std::__1::chrono::duration&lt;long="" long,="" std::__1::ratio&lt;1l,="" 1000000000l=""&gt; &gt; &gt;) + 93 3 com.apple.JavaScriptCore 0x00007fff3596ede6 bmalloc::Scavenger::threadRunLoop() + 774 4 com.apple.JavaScriptCore 0x00007fff3596e7a9 bmalloc::Scavenger::threadEntryPoint(bmalloc::Scavenger*) + 9 5 com.apple.JavaScriptCore 0x00007fff35970fc7 void* std::__1::__thread_proxy&lt;std::__1::tuple&lt;std::__1::unique_ptr&lt;std::__1::__thread_struct, std::__1::default_delete&lt;std::__1::__thread_struct=""&gt; &gt;, void (*)(bmalloc::Scavenger*), bmalloc::Scavenger*&gt; &gt;(void*) + 39 6 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 7 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 5:: com.apple.NSEventThread 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff312ad19b __CFRunLoopServiceMachPort + 322 3 com.apple.CoreFoundation 0x00007fff312ac737 __CFRunLoopRun + 1695 4 com.apple.CoreFoundation 0x00007fff312abe13 CFRunLoopRunSpecific + 499 5 com.apple.AppKit 0x00007fff2e4e9196 _NSEventThread + 132 6 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 7 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 6: 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.spotlight.index 0x00007fff5fdab7cf _handleExceptions + 120 3 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 4 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 7:: DYMobileDeviceManager 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff312ad19b __CFRunLoopServiceMachPort + 322 3 com.apple.CoreFoundation 0x00007fff312ac737 __CFRunLoopRun + 1695 4 com.apple.CoreFoundation 0x00007fff312abe13 CFRunLoopRunSpecific + 499 5 com.apple.Foundation 0x00007fff33946cad -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212 6 com.apple.Foundation 0x00007fff33946bc6 -[NSRunLoop(NSRunLoop) run] + 76 7 com.apple.GPUToolsMobileFoundation 0x00000001253fd5a9 -[DYMobileDeviceManager _deviceNotificationThread:] + 126 8 com.apple.Foundation 0x00007fff3393cef2 __NSThread__start__ + 1064 9 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 10 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 8: 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff312ad19b __CFRunLoopServiceMachPort + 322 3 com.apple.CoreFoundation 0x00007fff312ac737 __CFRunLoopRun + 1695 4 com.apple.CoreFoundation 0x00007fff312abe13 CFRunLoopRunSpecific + 499 5 com.apple.CoreFoundation 0x00007fff312abbea CFRunLoopRun + 40 6 libSwiftPM.dylib 0x000000012ab92486 closure #1 in FSEventStream.start() + 262 7 libSwiftPM.dylib 0x000000012aa10f22 closure #1 in Thread.init(task:) + 146 8 libSwiftPM.dylib 0x000000012aa11079 thunk for @escaping @callee_guaranteed () -&gt; () + 25 9 libSwiftPM.dylib 0x000000012aa1103e @objc ThreadImpl.main() + 46 10 com.apple.Foundation 0x00007fff3393cef2 __NSThread__start__ + 1064 11 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 12 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 9:: WebCore: LocalStorage 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe3d9 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 3961 3 com.apple.WebKitLegacy 0x00007fff41cfbce5 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.WebKitLegacy 0x00007fff41cfe991 std::__1::unique_ptr&lt;***::function, std::__1::default_delete&lt;***::function &gt; &gt; ***::MessageQueue&lt;***::function &gt;::waitForMessageFilteredWithTimeout&lt;***::messagequeue&lt;***::function &gt;::waitForMessage()::'lambda'(***::Function const&amp;)&gt;(***::MessageQueueWaitResult&amp;, ***::MessageQueue&lt;***::function &gt;::waitForMessage()::'lambda'(***::Function const&amp;)&amp;&amp;, ***::Seconds) + 161 5 com.apple.WebKitLegacy 0x00007fff41cfe55c ***::Detail::CallableWrapper&lt;webcore::storagethread::start()::$_0, void=""&gt;::call() + 140 6 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 7 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 8 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 9 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 10: 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff312ad19b __CFRunLoopServiceMachPort + 322 3 com.apple.CoreFoundation 0x00007fff312ac737 __CFRunLoopRun + 1695 4 com.apple.CoreFoundation 0x00007fff312abe13 CFRunLoopRunSpecific + 499 5 com.apple.CoreFoundation 0x00007fff312abbea CFRunLoopRun + 40 6 libSwiftPM.dylib 0x000000012ab92486 closure #1 in FSEventStream.start() + 262 7 libSwiftPM.dylib 0x000000012aa10f22 closure #1 in Thread.init(task:) + 146 8 libSwiftPM.dylib 0x000000012aa11079 thunk for @escaping @callee_guaranteed () -&gt; () + 25 9 libSwiftPM.dylib 0x000000012aa1103e @objc ThreadImpl.main() + 46 10 com.apple.Foundation 0x00007fff3393cef2 __NSThread__start__ + 1064 11 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 12 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 11: 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff312ad19b __CFRunLoopServiceMachPort + 322 3 com.apple.CoreFoundation 0x00007fff312ac737 __CFRunLoopRun + 1695 4 com.apple.CoreFoundation 0x00007fff312abe13 CFRunLoopRunSpecific + 499 5 com.apple.CoreFoundation 0x00007fff312abbea CFRunLoopRun + 40 6 libSwiftPM.dylib 0x000000012ab92486 closure #1 in FSEventStream.start() + 262 7 libSwiftPM.dylib 0x000000012aa10f22 closure #1 in Thread.init(task:) + 146 8 libSwiftPM.dylib 0x000000012aa11079 thunk for @escaping @callee_guaranteed () -&gt; () + 25 9 libSwiftPM.dylib 0x000000012aa1103e @objc ThreadImpl.main() + 46 10 com.apple.Foundation 0x00007fff3393cef2 __NSThread__start__ + 1064 11 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 12 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 12:: Connection::RunLoop() packet reading thread 0 libsystem_kernel.dylib 0x00007fff685f6e76 read + 10 1 com.apple.LLDBRPC 0x000000011bca50fc rpc_common::RPCConnectionSocket::Read(std::__1::basic_string, std::__1::allocator &gt;&amp;, bool) + 172 2 com.apple.LLDBRPC 0x000000011bc9e2b0 rpc_common::Connection::ReceivePacket(rpc_common::RPCPacket&amp;) + 176 3 com.apple.LLDBRPC 0x000000011bc9e047 rpc_common::Connection::RunLoop() + 215 4 com.apple.LLDBRPC 0x000000011bca35bd void* std::__1::__thread_proxy&lt;std::__1::tuple&lt;std::__1::unique_ptr&lt;std::__1::__thread_struct, std::__1::default_delete&lt;std::__1::__thread_struct=""&gt; &gt;, rpc_common::Connection::AdoptUnixSocket(int)::$_0&gt; &gt;(void*) + 45 5 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 6 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 13:: IOReader::ReadThread() for fd 95 0 libsystem_kernel.dylib 0x00007fff685fc7c6 __select + 10 1 com.apple.LLDBRPC 0x000000011bc9a3b3 IOReader::ReadThread(std::__1::function) + 371 2 com.apple.LLDBRPC 0x000000011bc9a995 void* std::__1::__thread_proxy&lt;std::__1::tuple&lt;std::__1::unique_ptr&lt;std::__1::__thread_struct, std::__1::default_delete&lt;std::__1::__thread_struct=""&gt; &gt;, IOReader::StartReadThread(std::__1::function)::$_0&gt; &gt;(void*) + 133 3 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 4 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 14: 0 libsystem_kernel.dylib 0x00007fff685fa482 __wait4 + 10 1 com.apple.LLDBRPC 0x000000011bc9b967 PosixSpawn::ReapProcess(int, int*, int*) + 71 2 com.apple.LLDBRPC 0x000000011bca3b07 void* std::__1::__thread_proxy&lt;std::__1::tuple&lt;std::__1::unique_ptr&lt;std::__1::__thread_struct, std::__1::default_delete&lt;std::__1::__thread_struct=""&gt; &gt;, rpc_common::Connection::SpawnRPCServerProcess()::$_2&gt; &gt;(void*) + 71 3 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 4 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 15: 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 com.apple.CoreFoundation 0x00007fff312ad19b __CFRunLoopServiceMachPort + 322 3 com.apple.CoreFoundation 0x00007fff312ac737 __CFRunLoopRun + 1695 4 com.apple.CoreFoundation 0x00007fff312abe13 CFRunLoopRunSpecific + 499 5 com.apple.CoreFoundation 0x00007fff312abbea CFRunLoopRun + 40 6 com.apple.DebugSymbols 0x00007fff4aa5bbeb SpotlightQueryThread(void*) + 475 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 16: 0 libsystem_pthread.dylib 0x00007fff686b55b4 start_wqthread + 0 Thread 17: 0 libsystem_pthread.dylib 0x00007fff686b55b4 start_wqthread + 0 Thread 18 Crashed:: Dispatch queue: com.apple.NSXPCConnection.user.com.apple.dt.Xcode.sourcecontrol.Git 0 libobjc.A.dylib 0x00007fff67143598 objc_release + 24 1 com.apple.dt.Xcode.DVTSourceControl 0x0000000110434ab7 __destroy_helper_block_e8_32s40s48s56s + 38 2 libsystem_blocks.dylib 0x00007fff68503bed _Block_release + 101 3 com.apple.Foundation 0x00007fff33937be1 -[_NSXPCConnectionExpectedReplyInfo dealloc] + 42 4 com.apple.Foundation 0x00007fff33a6b7b4 __destroy_helper_block_e8_32o40o48o + 37 5 libsystem_blocks.dylib 0x00007fff68503bed _Block_release + 101 6 libxpc.dylib 0x00007fff686f9f98 _xpc_connection_call_reply_async + 81 7 libdispatch.dylib 0x00007fff6845c548 _dispatch_client_callout3 + 8 8 libdispatch.dylib 0x00007fff68473080 _dispatch_mach_msg_async_reply_invoke + 369 9 libdispatch.dylib 0x00007fff68461950 _dispatch_lane_serial_drain + 263 10 libdispatch.dylib 0x00007fff68462455 _dispatch_lane_invoke + 414 11 libdispatch.dylib 0x00007fff6846baa1 _dispatch_workloop_worker_thread + 598 12 libsystem_pthread.dylib 0x00007fff686b5763 _pthread_wqthread + 290 13 libsystem_pthread.dylib 0x00007fff686b55c3 start_wqthread + 15 Thread 19: 0 libsystem_pthread.dylib 0x00007fff686b55b4 start_wqthread + 0 Thread 20:: Dispatch queue: com.apple.NSXPCConnection.user.com.apple.dt.Xcode.sourcecontrol.Git 0 libobjc.A.dylib 0x00007fff67143598 objc_release + 24 1 com.apple.Foundation 0x00007fff33c1d3a0 _NSXPCInterfaceMethodInfoDealloc + 29 2 com.apple.CoreFoundation 0x00007fff312a733e __CFDictionaryApplyFunction_block_invoke + 22 3 com.apple.CoreFoundation 0x00007fff312a7104 CFBasicHashApply + 124 4 com.apple.CoreFoundation 0x00007fff312a7038 CFDictionaryApplyFunction + 128 5 com.apple.Foundation 0x00007fff3395a5ba -[_NSXPCInterfaceInfo dealloc] + 44 6 com.apple.Foundation 0x00007fff3395a553 -[NSXPCInterface dealloc] + 36 7 com.apple.Foundation 0x00007fff3395a710 -[NSXPCConnection dealloc] + 137 8 libsystem_blocks.dylib 0x00007fff68503bed _Block_release + 101 9 libdispatch.dylib 0x00007fff6845c4de _dispatch_client_callout + 8 10 libdispatch.dylib 0x00007fff68461a9e _dispatch_lane_serial_drain + 597 11 libdispatch.dylib 0x00007fff68462455 _dispatch_lane_invoke + 414 12 libdispatch.dylib 0x00007fff6846baa1 _dispatch_workloop_worker_thread + 598 13 libsystem_pthread.dylib 0x00007fff686b5763 _pthread_wqthread + 290 14 libsystem_pthread.dylib 0x00007fff686b55c3 start_wqthread + 15 Thread 21:: Dispatch queue: DVTInvalidationPreventionQueue 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 libdispatch.dylib 0x00007fff6847082f _dispatch_mach_send_and_wait_for_reply + 632 3 libdispatch.dylib 0x00007fff68470c72 dispatch_mach_send_with_result_and_wait_for_reply + 50 4 libxpc.dylib 0x00007fff686f4a1b xpc_connection_send_message_with_reply_sync + 238 5 com.apple.dt.SourceKit 0x000000010d0d91a1 sourcekit_send_request_sync + 97 6 com.apple.dt.IDEFoundation 0x00000001049a11da -[IDESourceKitLowLevelConnection sendRequestSync:] + 110 7 com.apple.dt.IDEFoundation 0x00000001049a132b -[IDESourceKitLowLevelConnection sendRequestSync:error:] + 30 8 com.apple.dt.IDEFoundation 0x00000001047ec42b -[IDESourceKitWorkspace(RequestMethods) geniusCallersCalleesAtDocument:fileContent:error:] + 463 9 com.apple.dt.IDEFoundation 0x000000010469ae8e -[IDESourceKitWorkspace geniusCallersCalleesAtLocation:withCurrentFileContentDictionary:] + 162 10 com.apple.dt.IDESourceEditor 0x00000001200f3472 specialized SourceCodeCallersCalleesGeniusResultsFinder._fetchResults(from:with:cancellationChecker:) + 514 11 com.apple.dt.IDESourceEditor 0x00000001200f0f2b @objc SourceCodeCallersCalleesGeniusResultsFinder._fetchResults(from:with:cancellationChecker:) + 91 12 com.apple.dt.IDEKit 0x000000010586454e __99-[IDEMultiStepIndexGeniusResultsFinder _getUpdateGeniusResultsPhase1Block:phase2Block:phase3Block:]_block_invoke.647 + 110 13 com.apple.dt.IDEKit 0x0000000105864101 __51-[IDEIndexGeniusResultsFinder _updateGeniusResults]_block_invoke.633 + 24 14 com.apple.dt.DVTFoundation 0x0000000103b4a041 ___DVTPreventInvalidationForObjectAllowingRecursiveCallsDuringBlock_block_invoke_2 + 75 15 libdispatch.dylib 0x00007fff6845c4de _dispatch_client_callout + 8 16 libdispatch.dylib 0x00007fff68468a81 _dispatch_sync_invoke_and_complete + 60 17 com.apple.dt.DVTFoundation 0x0000000103b49fc7 ___DVTPreventInvalidationForObjectAllowingRecursiveCallsDuringBlock_block_invoke + 154 18 libdispatch.dylib 0x00007fff6845c4de _dispatch_client_callout + 8 19 libdispatch.dylib 0x00007fff68468a81 _dispatch_sync_invoke_and_complete + 60 20 com.apple.dt.DVTFoundation 0x0000000103b49c48 _DVTPreventInvalidationForObjectAllowingRecursiveCallsDuringBlock + 382 21 com.apple.dt.DVTFoundation 0x0000000103b4a31b _DVTPreventInvalidationAllowingRecursiveCallsDuringBlock + 35 22 com.apple.dt.IDEKit 0x0000000105863e04 __51-[IDEIndexGeniusResultsFinder _updateGeniusResults]_block_invoke.627 + 475 23 com.apple.dt.DVTFoundation 0x0000000103d5c9ca __DVT_CALLING_CLIENT_BLOCK__ + 7 24 com.apple.dt.DVTFoundation 0x0000000103d5e0a2 __DVTDispatchAsync_block_invoke + 809 25 libdispatch.dylib 0x00007fff6845b553 _dispatch_call_block_and_release + 12 26 libdispatch.dylib 0x00007fff6845c4de _dispatch_client_callout + 8 27 libdispatch.dylib 0x00007fff68461a9e _dispatch_lane_serial_drain + 597 28 libdispatch.dylib 0x00007fff68462422 _dispatch_lane_invoke + 363 29 libdispatch.dylib 0x00007fff6846baa1 _dispatch_workloop_worker_thread + 598 30 libsystem_pthread.dylib 0x00007fff686b5763 _pthread_wqthread + 290 31 libsystem_pthread.dylib 0x00007fff686b55c3 start_wqthread + 15 Thread 22:: Heap Helper Thread 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe416 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 4022 3 com.apple.JavaScriptCore 0x00007fff352f7085 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.JavaScriptCore 0x00007fff358d5808 ***::Detail::CallableWrapper&lt;***::automaticthread::start(***::abstractlocker const&amp;)::$_0,="" void=""&gt;::call() + 312 5 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 6 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 23:: Heap Helper Thread 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe416 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 4022 3 com.apple.JavaScriptCore 0x00007fff352f7085 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.JavaScriptCore 0x00007fff358d5808 ***::Detail::CallableWrapper&lt;***::automaticthread::start(***::abstractlocker const&amp;)::$_0,="" void=""&gt;::call() + 312 5 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 6 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 24:: Heap Helper Thread 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe416 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 4022 3 com.apple.JavaScriptCore 0x00007fff352f7085 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.JavaScriptCore 0x00007fff358d5808 ***::Detail::CallableWrapper&lt;***::automaticthread::start(***::abstractlocker const&amp;)::$_0,="" void=""&gt;::call() + 312 5 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 6 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 25:: Heap Helper Thread 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe416 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 4022 3 com.apple.JavaScriptCore 0x00007fff352f7085 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.JavaScriptCore 0x00007fff358d5808 ***::Detail::CallableWrapper&lt;***::automaticthread::start(***::abstractlocker const&amp;)::$_0,="" void=""&gt;::call() + 312 5 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 6 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 26:: Heap Helper Thread 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe416 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 4022 3 com.apple.JavaScriptCore 0x00007fff352f7085 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.JavaScriptCore 0x00007fff358d5808 ***::Detail::CallableWrapper&lt;***::automaticthread::start(***::abstractlocker const&amp;)::$_0,="" void=""&gt;::call() + 312 5 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 6 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 27:: Heap Helper Thread 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe416 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 4022 3 com.apple.JavaScriptCore 0x00007fff352f7085 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.JavaScriptCore 0x00007fff358d5808 ***::Detail::CallableWrapper&lt;***::automaticthread::start(***::abstractlocker const&amp;)::$_0,="" void=""&gt;::call() + 312 5 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 6 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 28: 0 libsystem_pthread.dylib 0x00007fff686b55b4 start_wqthread + 0 Thread 29:: Dispatch queue: SourceKitLanguageServiceSemaQueue 0 libsystem_kernel.dylib 0x00007fff685f5146 mach_msg_trap + 10 1 libsystem_kernel.dylib 0x00007fff685f56ac mach_msg + 60 2 libdispatch.dylib 0x00007fff6847082f _dispatch_mach_send_and_wait_for_reply + 632 3 libdispatch.dylib 0x00007fff68470c72 dispatch_mach_send_with_result_and_wait_for_reply + 50 4 libxpc.dylib 0x00007fff686f4a1b xpc_connection_send_message_with_reply_sync + 238 5 com.apple.dt.SourceKit 0x000000010d0d91a1 sourcekit_send_request_sync + 97 6 com.apple.dt.DVTSourceEditor 0x000000012105ec05 EditorSourceKitService.RequestDispatcher.dispatchRequestSync(_:) + 37 7 com.apple.dt.DVTSourceEditor 0x000000012106033d protocol witness for SourceKitService.sendSemanticRequestSync(_:_:completionBlock:) in conformance EditorSourceKitService + 29 8 com.apple.SourceKitSupport 0x0000000120c80111 SourceKitSemanticRequest.sendRequest(_:completionBlock:) + 1089 9 com.apple.SourceKitSupport 0x0000000120cacb2e closure #1 in SourceKitLanguageService.referencesToSymbolAtPosition(_:cancelledBlock:completionBlock:) + 622 10 com.apple.SourceKitSupport 0x0000000120cd0831 partial apply for closure #1 in SourceKitLanguageService.referencesToSymbolAtPosition(_:cancelledBlock:completionBlock:) + 49 11 com.apple.SourceKitSupport 0x0000000120c9ea49 thunk for @escaping @callee_guaranteed () -&gt; () + 25 12 libdispatch.dylib 0x00007fff6845b553 _dispatch_call_block_and_release + 12 13 libdispatch.dylib 0x00007fff6845c4de _dispatch_client_callout + 8 14 libdispatch.dylib 0x00007fff68461a9e _dispatch_lane_serial_drain + 597 15 libdispatch.dylib 0x00007fff68462422 _dispatch_lane_invoke + 363 16 libdispatch.dylib 0x00007fff6846baa1 _dispatch_workloop_worker_thread + 598 17 libsystem_pthread.dylib 0x00007fff686b5763 _pthread_wqthread + 290 18 libsystem_pthread.dylib 0x00007fff686b55c3 start_wqthread + 15 Thread 30: 0 libsystem_pthread.dylib 0x00007fff686b55b4 start_wqthread + 0 Thread 31: 0 libsystem_pthread.dylib 0x00007fff686b55b4 start_wqthread + 0 Thread 32:: JIT Worklist Helper Thread 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe416 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 4022 3 com.apple.JavaScriptCore 0x00007fff352f7085 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.JavaScriptCore 0x00007fff358d5808 ***::Detail::CallableWrapper&lt;***::automaticthread::start(***::abstractlocker const&amp;)::$_0,="" void=""&gt;::call() + 312 5 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 6 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 33:: DFG Worklist Worker Thread 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe416 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 4022 3 com.apple.JavaScriptCore 0x00007fff352f7085 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.JavaScriptCore 0x00007fff358d5808 ***::Detail::CallableWrapper&lt;***::automaticthread::start(***::abstractlocker const&amp;)::$_0,="" void=""&gt;::call() + 312 5 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 6 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 34:: DFG Worklist Worker Thread 0 libsystem_kernel.dylib 0x00007fff685f88f6 __psynch_cvwait + 10 1 libsystem_pthread.dylib 0x00007fff686b9082 _pthread_cond_wait + 701 2 com.apple.JavaScriptCore 0x00007fff358fe416 ***::ParkingLot::parkConditionallyImpl(void const*, ***::ScopedLambda const&amp;, ***::ScopedLambda const&amp;, ***::TimeWithDynamicClockType const&amp;) + 4022 3 com.apple.JavaScriptCore 0x00007fff352f7085 bool ***::Condition::waitUntil(***::Lock&amp;, ***::TimeWithDynamicClockType const&amp;) + 165 4 com.apple.JavaScriptCore 0x00007fff358d5808 ***::Detail::CallableWrapper&lt;***::automaticthread::start(***::abstractlocker const&amp;)::$_0,="" void=""&gt;::call() + 312 5 com.apple.JavaScriptCore 0x00007fff35917103 ***::Thread::entryPoint(***::Thread::NewThreadContext*) + 403 6 com.apple.JavaScriptCore 0x00007fff35919ca9 ***::wtfThreadEntryPoint(void*) (.llvm.7274605405832033306) + 9 7 libsystem_pthread.dylib 0x00007fff686b8d76 _pthread_start + 125 8 libsystem_pthread.dylib 0x00007fff686b55d7 thread_start + 15 Thread 18 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x00007f83143e4f30 rcx: 0x0100000000000000 rdx: 0x0040000000000000 rdi: 0x00007f82fe445ef0 rsi: 0x071d8001104ca425 rbp: 0x000070000ab05110 rsp: 0x000070000ab050f8 r8: 0x000007f82fe43190 r9: 0x0000000000000006 r10: 0x00007f82fe400000 r11: 0x0000000000000000 r12: 0x00007f830dc4da70 r13: 0x00007f8310055600 r14: 0x00007fff67143580 r15: 0x00007f82fcf79420 rip: 0x00007fff67143598 rfl: 0x0000000000010246 cr2: 0x0000000000000020 Logical CPU: 3 Error Code: 0x00000004 (no mapping for user data write) Trap Number: 14