Here's a sample stack trace:

0x00007fff4411e794	(AppKit + 0x0036c794 )	-[NSApplication _crashOnException:]
0x00007fff4411e67b	(AppKit + 0x0036c67b )	-[NSApplication reportException:]
0x00007fff44208ddf	(AppKit + 0x00456ddf )	uncaughtErrorProc
0x00007fff46928dd2	(CoreFoundation + 0x0019cdd2 )	__handleUncaughtException
0x00007fff6d534e9c	(libobjc.A.dylib + 0x00016e9c )	_objc_terminate()
0x00007fff6c1c57c8	(libc++abi.dylib + 0x0001d7c8 )	std::__terminate(void (*)())
0x00007fff6c1c526c	(libc++abi.dylib + 0x0001d26c )	__cxa_throw
0x00007fff6d532da4	(libobjc.A.dylib + 0x00014da4 )	objc_exception_throw
0x00007fff4689cd61	(CoreFoundation + 0x00110d61 )	+[NSException raise:format:arguments:]
0x00007fff48a0452a	(Foundation + 0x0014252a )	-[NSAssertionHandler handleFailureInFunction:file:lineNumber:description:]
0x00007fff4438f78d	(AppKit + 0x005dd78d )	-[NSEvent _initDigitizerTouchesFromIOHidEvent:window:contextID:]
0x00007fff44392625	(AppKit + 0x005e0625 )	-[NSEvent _initWithCGEvent:eventRef:]
0x00007fff44589c97	(AppKit + 0x007d7c97 )	-[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:]
0x00000001075f279f	(Google Chrome Framework -chrome_browser_application_mac.mm:175 )	__71-[BrowserCrApplication nextEventMatchingMask:untilDate:inMode:dequeue:]_block_invoke
0x00000001079a3949	(Google Chrome Framework + 0x01d71949 )	base::mac::CallWithEHFrame(void () block_pointer)
0x00000001075f26e3	(Google Chrome Framework -chrome_browser_application_mac.mm:174 )	-[BrowserCrApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
0x00007fff43de8d6c	(AppKit + 0x00036d6c )	-[NSApplication run]
0x00000001079b26b6	(Google Chrome Framework -message_pump_mac.mm:804 )	base::MessagePumpNSApplication::DoRun(base::MessagePump::Delegate*)
0x00000001079b123d	(Google Chrome Framework -message_pump_mac.mm:179 )	base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*)
0x00000001079d42e3	(Google Chrome Framework -run_loop.cc:114 )	<name omitted>
0x00000001075f8477	(Google Chrome Framework -chrome_browser_main.cc:1939 )	ChromeBrowserMainParts::MainMessageLoopRun(int*)
0x00000001063a0f13	(Google Chrome Framework -browser_main_loop.cc:1199 )	content::BrowserMainLoop::RunMainMessageLoopParts()
0x00000001063a3881	(Google Chrome Framework -browser_main_runner.cc:140 )	content::BrowserMainRunnerImpl::Run()
0x000000010639d51b	(Google Chrome Framework -browser_main.cc:46 )	content::BrowserMain(content::MainFunctionParams const&)
0x00000001075ab7de	(Google Chrome Framework -content_main_runner.cc:705 )	content::ContentMainRunnerImpl::Run()
0x0000000108e8454a	(Google Chrome Framework -main.cc:456 )	service_manager::Main(service_manager::MainParams const&)
0x00000001075aad93	(Google Chrome Framework -content_main.cc:19 )	content::ContentMain(content::ContentMainParams const&)
0x0000000105c3586e	(Google Chrome Framework -chrome_main.cc:130 )	ChromeMain
0x000000010523fdd3	(Google Chrome -chrome_exe_main_mac.cc:165 )	main
0x00007fff6e122114	(libdyld.dylib + 0x00001114 )	start
0x00007fff6e122114	(libdyld.dylib + 0x00001114 )	start

This is a significant chunk of the current stable crash rate.