This is a common and longstanding community crash on Mac. Users have not provided descriptions when they crash, so additional information is currently not available. A log file is attached.
Callstack from Log
LogMetal:Warning: Reallocating ring-buffer from 1773056 to 2216320 to avoid wrapping write at offset 595968 into outstanding buffer region 595744 at frame 3589] LogCrashTracker: LogMac: === Critical error: === SIGABRT: abort() called LogMac: __pthread_kill() Address = 0xd2b84d42 (filename not found) [in libsystem_kernel.dylib] abort() Address = 0xd2aea420 (filename not found) [in libsystem_c.dylib] -[PLCrashReporter generateLiveReportWithThread:] Address = 0xdf1ea6c (filename not found) [in UE4Editor-Core.dylib] DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) Address = 0xbc815b4d (filename not found) [in HIToolbox] SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) Address = 0xbc814ff6 (filename not found) [in HIToolbox] SendEventToEventTargetWithOptions() Address = 0xbc814e3f (filename not found) [in HIToolbox] SendTSMEvent_WithCompletionHandler() Address = 0xbc86c6d6 (filename not found) [in HIToolbox] __SendTextInputEvent_WithCompletionHandler_block_invoke() Address = 0xbca2061c (filename not found) [in HIToolbox] SendTextInputEvent_WithCompletionHandler() Address = 0xbca1e92d (filename not found) [in HIToolbox] -[IMKInputSession _postEvent:completionHandler:] Address = 0xbca905b5 (filename not found) [in HIToolbox] -[IMKInputSession _copyUniCharsForRange:intoBuffer:ofLength:completionHandler:] Address = 0xbcaa120e (filename not found) [in HIToolbox] -[IMKInputSession _coreAttributesFromRange:whichAttributes:completionHandler:] Address = 0xbcaa1997 (filename not found) [in HIToolbox] -[IMKInputSession attributedSubstringFromRange:completionHandler:] Address = 0xbcaa3939 (filename not found) [in HIToolbox] __61-[IMKInputSession imkxpc_attributedSubstringFromRange:reply:]_block_invoke Address = 0xbca93137 (filename not found) [in HIToolbox] __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__() Address = 0xbd2fc17c (filename not found) [in CoreFoundation] __CFRunLoopDoBlocks() Address = 0xbd2dcf84 (filename not found) [in CoreFoundation] __CFRunLoopRun() Address = 0xbd2dcac6 (filename not found) [in CoreFoundation] CFRunLoopRunSpecific() Address = 0xbd2dc114 (filename not found) [in CoreFoundation] -[IMKInputSessionXPCInvocation invocationAwaitXPCReply] Address = 0xbca7a19e (filename not found) [in HIToolbox] -[IMKClient menuWithCompletionHandler:] Address = 0xbca67911 (filename not found) [in HIToolbox] IMKInputSessionGetMenuIntoMenuWithCompletionHandler() Address = 0xbca30907 (filename not found) [in HIToolbox] GetInputMethodInstanceMenu_IntoMenu_WithCompletionHandler() Address = 0xbca2fce3 (filename not found) [in HIToolbox] utTryToSetupInputMethodMenu() Address = 0xbca2326a (filename not found) [in HIToolbox] __utSetupInputMethodMenuFromDeferredBlock_block_invoke() Address = 0xbca23082 (filename not found) [in HIToolbox] __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__() Address = 0xbd2fc17c (filename not found) [in CoreFoundation] __CFRunLoopDoBlocks() Address = 0xbd2dcf84 (filename not found) [in CoreFoundation] __CFRunLoopRun() Address = 0xbd2dc705 (filename not found) [in CoreFoundation] CFRunLoopRunSpecific() Address = 0xbd2dc114 (filename not found) [in CoreFoundation] RunCurrentEventLoopInMode() Address = 0xbc83debc (filename not found) [in HIToolbox] ReceiveNextEventCommon() Address = 0xbc83dbf9 (filename not found) [in HIToolbox] _BlockUntilNextEventMatchingListInModeWithFilter() Address = 0xbc83db26 (filename not found) [in HIToolbox] _DPSNextEvent() Address = 0xbadd6a54 (filename not found) [in AppKit] -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] Address = 0xbb5527ee (filename not found) [in AppKit] -[NSApplication run] Address = 0xbadcb3db (filename not found) [in AppKit] tchar_main(int, wchar_t**) Address = 0xde9db23 (filename not found) [in UE4Editor] main() Address = 0xde9d3b9 (filename not found) [in UE4Editor] start() Address = 0xd2a56235 (filename not found) [in libdyld.dylib]
Result:
Editor crashes with a DispatchEventToHandlers() error
Expected Result:
The Scalar Parameter's value is set to 1
Update: a user provided the following:
"100% reproducible: - On macOS Sierra, turn on Chinese Pinyin input. - Open Material Editor and create a Constant Value in Graph panel. - In Detail panel, change the value to 1.0. - Crash. Seems UE editor does not like a mix of Piyin with its entry boxes."
#0 at 0x7fff9c8fcd42 *** Terminating app due to uncaught exception 'NSRangeException', reason: '-[NSTaggedPointerString getCharacters:range:]: Range {0, 5} out of bounds; string length 1'
libsystem_kernel.dylib!<Unknown>
libsystem_c.dylib!<Unknown>
UE4Editor-Core.dylib!<Unknown>
???!Unknown()
HIToolbox!DispatchEventToHandlers()
HIToolbox!SendEventToEventTargetInternal()
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
CoreFoundation!Unknown()
CoreFoundation!Unknown()
CoreFoundation!Unknown()
CoreFoundation!Unknown()
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
CoreFoundation!Unknown()
CoreFoundation!Unknown()
CoreFoundation!Unknown()
CoreFoundation!Unknown()
HIToolbox!<Unknown>
HIToolbox!<Unknown>
HIToolbox!<Unknown>
AppKit!<Unknown>
AppKit!-[NSApplication()
AppKit!<Unknown>
UE4Editor!tchar_main()
UE4Editor!<Unknown>
libdyld.dylib!<Unknown>
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-46405 in the post.