GPU Capture Crash

Hi,

I try to debugging the shader, but GPU capture will crash on command buffer commit function if I don't click the capture button within 2~3 seconds after the game started rendering.

And when I got a capture within the 2~3 second windows, the xcode sometimes will crash with following info in the reporter:

pplication Specific Information:
ProductBuildVersion: 10B61
ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEFrameworks_Fall2018/IDEFrameworks-14460.46/IDEFoundation/Initialization/IDEInitialization.m:661
Details:  Deallocating NSView off MainThread: -[DBGLLDBSession _cancelAndClearAllSessionThreadActionsWithActionsLockAlreadyTaken] called -[NSControl dealloc] from non-main thread. Set the default 'IDEMainThreadChecker_DisableHardAssertions = 1' to disable this.
Function: void _IDEApplicationMainThreadCheckerReportCallback(const char *)
Thread:   <NSThread: 0x7ffb176e22d0>{number = 347, name = (null)}
Hints:   

Backtrace:
  0   -[IDEAssertionHandler handleFailureInFunction:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in IDEKit)
  1   _DVTAssertionHandler (in DVTFoundation)
  2   _DVTAssertionFailureHandler (in DVTFoundation)
  3   _IDEApplicationMainThreadCheckerReportCallback (in IDEFoundation)
  4   __ASSERT_API_MUST_BE_CALLED_FROM_MAIN_THREAD_FAILED__ (in libMainThreadChecker.dylib)
  5   checker_c (in libMainThreadChecker.dylib)
  6   trampoline_c (in libMainThreadChecker.dylib)
  7   handler_start (in libMainThreadChecker.dylib)
  8   -[DBGVariablesViewContentProvider .cxx_destruct] (in DebuggerUI)
  9   object_cxxDestructFromClass(objc_object*, objc_class*) (in libobjc.A.dylib)
 10   objc_destructInstance (in libobjc.A.dylib)
 11   object_dispose (in libobjc.A.dylib)
 12   _DVTInvalidation_HardAssertDidInvalidateDeallocSuper (in DVTFoundation)
 13   __destroy_helper_block_.294 (in DebuggerUI)
 14   _Block_release (in libsystem_blocks.dylib)
 15   _Block_release (in libsystem_blocks.dylib)
 16   _Block_release (in libsystem_blocks.dylib)
 17   -[__NSArrayM removeAllObjects] (in CoreFoundation)
 18   -[DBGLLDBSession _cancelAndClearAllSessionThreadActionsWithActionsLockAlreadyTaken] (in DebuggerLLDB)
 19   __80-[DBGLLDBSession _cancelAndClearAllSessionThreadActionsByFirstTakingActionsLock]_block_invoke (in DebuggerLLDB)
 20   _dispatch_client_callout (in libdispatch.dylib)
 21   _dispatch_lane_barrier_sync_invoke_and_complete (in libdispatch.dylib)
 22   DVTDispatchBarrierSync (in DVTFoundation)
 23   -[DVTDispatchLock performLockedBlock:] (in DVTFoundation)
 24   -[DBGLLDBSession _cancelAndClearAllSessionThreadActionsByFirstTakingActionsLock] (in DebuggerLLDB)
 25   DBGLLDBSessionThread(void*) (in DebuggerLLDB)
 26   _pthread_body (in libsystem_pthread.dylib)
 27   _pthread_start (in libsystem_pthread.dylib)
 28   thread_start (in libsystem_pthread.dylib)


abort() called

I am using Xcode 10.1 and iPhone XS Max with iOS 12.1.2, really appreciate if anyone can give me some idea what could cause these crashes?

Thanks,

Kai