Process: Xcode [23372] Path: /Applications/Xcode.app/Contents/MacOS/Xcode Identifier: com.apple.dt.Xcode Version: 15.3 (22618) Build Info: IDEApplication-22618000000000000~2 (15E204a) App Item ID: 497799835 App External ID: 863955376 Code Type: ARM-64 (Native) Parent Process: launchd [1] User ID: 501 Date/Time: 2024-04-08 12:17:40.2432 +0800 OS Version: macOS 14.4.1 (23E224) Report Version: 12 Anonymous UUID: BB1A5EC1-5D64-AB4D-6AF1-5256B9493C2D Time Awake Since Boot: 2400 seconds System Integrity Protection: enabled Crashed Thread: 0 Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x00000001a01acee0 Termination Reason: Namespace SIGNAL, Code 5 Trace/BPT trap: 5 Terminating Process: exc handler [23372] Thread 0 Crashed: 0 libswiftCore.dylib 0x1a01acee0 _assertionFailure(_:_:file:line:flags:) + 268 1 IDEXCBuildSupportCore 0x33635ea3c specialized _NativeDictionary.merge<A>(_:isUnique:uniquingKeysWith:) + 928 2 IDEXCBuildSupportCore 0x336366320 specialized IDEXCBuildServiceBuildOperation.processEventStream(buildOperation:events:logger:context:) + 1164 3 IDEXCBuildSupportCore 0x33636f885 closure #1 in closure #3 in IDEXCBuildServiceBuildOperation.performCoreBuild() + 1 4 IDEXCBuildSupportCore 0x336362f5d partial apply for closure #1 in closure #3 in IDEXCBuildServiceBuildOperation.performCoreBuild() + 1 5 IDEXCBuildSupportCore 0x3363261b9 specialized thunk for @escaping @callee_guaranteed @Sendable @async () -> (@out A) + 1 6 IDEXCBuildSupportCore 0x336326891 partial apply for specialized thunk for @escaping @callee_guaranteed @Sendable @async () -> (@out A) + 1 7 libswift_Concurrency.dylib 0x256baf0f9 completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError*) + 1 I have the same issue with one of our project. Could the develop supporter to check out this issue? The steps to reproduce this issue: Open the project Just waiting, then xcode will be indexing About 2 seconds later, it crashed.