Hello, we have encountered a large number of __CFRunLoopServiceMachPort.cold crashes on iOS 26. These crashes frequently occur when the app transitions from the background to the foreground or is launched after sitting idle for a period of time. Despite extensive analysis, we have been unable to find a solution. Currently, the crash data indicates that this issue is specific to iOS 26. We would greatly appreciate your assistance. Thank you very much!
Hardware Model: iPhone18,1 OS Version: iPhone OS 26.5.2 (23F84) Release Type: User Baseband Version: 1.60.02
Crash Reporter Key: fda96a4036dcb83e124660e11b654c9484b81dae Incident Identifier: EF18C4DD-7624-42D0-BA72-F17BBC263B16
Time Awake Since Boot: 2900000 seconds
Triggered by Thread: 0, Dispatch Queue: com.apple.main-thread
Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x00000001917d316c
Termination Reason: Namespace SIGNAL, Code 5, Trace/BPT trap: 5 Terminating Process: exc handler [82210]
Application Specific Information: (ipc/rcv) invalid name
Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 CoreFoundation 0x1917d316c __CFRunLoopServiceMachPort.cold.1 + 64 1 CoreFoundation 0x19168a444 __CFRunLoopServiceMachPort + 416 2 CoreFoundation 0x191654310 __CFRunLoopRun + 1188 3 CoreFoundation 0x19165354c _CFRunLoopRunSpecificWithOptions + 532 4 GraphicsServices 0x236df7498 GSEventRunModal + 120 5 UIKitCore 0x19734c244 -[UIApplication _run] + 796 6 UIKitCore 0x1972b7158 UIApplicationMain + 332 7 KMMVideo 0x1047fe24c 0x104304000 + 5218892 8 dyld 0x18e261c1c start + 6928
Thread 1 name: transmit_hls_7683_193735 Thread 1: 0 libsystem_kernel.dylib 0x2407da5e8 __psynch_cvwait + 8 1 libsystem_pthread.dylib 0x1f0852b48 _pthread_cond_wait + 980 2 libc++.1.dylib 0x1a0d5dbcc std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 32 3 iOSPlayer 0x118cd6114 a_task_runner::worker() + 116 4 iOSPlayer 0x118cd5650 a_task_runner::work_thread() + 196 5 iOSPlayer 0x118cd654c void* std::__1::__thread_proxy[abi:ne200100]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void (a_task_runner::)(), a_task_runner>>(void*) + 72 6 libsystem_pthread.dylib 0x1f0854438 _pthread_start + 136 7 libsystem_pthread.dylib 0x1f08508cc thread_start + 8
Thread 2: 0 libsystem_kernel.dylib 0x2407d9ed8 read + 8 1 XLTranscodeKit 0x115bb5f4c runtime.read_trampoline.abi0 + 28
Thread 3:
Thread 4: 0 libsystem_kernel.dylib 0x2407da5e8 __psynch_cvwait + 8 1 libsystem_pthread.dylib 0x1f0852b48 _pthread_cond_wait + 980 2 XLTranscodeKit 0x115bb6648 runtime.pthread_cond_wait_trampoline.abi0 + 24 3 XLTranscodeKit 0x115bb4fb8 runtime.asmcgocall.abi0 + 200 4 ??? 0xd65f03c0 ???
Thread 5: 0 XLTranscodeKit 0x115b3eb68 */bytealg.IndexByteString + 40 1 XLTranscodeKit 0x115b966b8 runtime.findnull + 104
Thread 6: 0 libsystem_kernel.dylib 0x2407db8dc kevent + 8 1 XLTranscodeKit 0x115bb6398 runtime.kevent_trampoline.abi0 + 40
Thread 7: 0 libsystem_kernel.dylib 0x2407da5e8 __psynch_cvwait + 8 1 libsystem_pthread.dylib 0x1f0852b48 _pthread_cond_wait + 980 2 XLTranscodeKit 0x115bb6648 runtime.pthread_cond_wait_trampoline.abi0 + 24 3 XLTranscodeKit 0x115bb4fb8 runtime.asmcgocall.abi0 + 200 4 ??? 0xd65f03c0 ???