ToastNotificationSample - Exception in code starting Maps from toast action button

[kellymor]

ToastNotificationSample-Failure.txt
I was able to build and run the ToastNotificationSample. After selecting the "Toast notification with actions", a toast notification appeared. I selected the "Show map" button and the Maps app started. The sample app then threw an exception dialog.

Notification tag: myTag
Notification group: myGroup
Notification args: bingmaps:?q=antelop%20canyon
Exception thrown at 0x76137922 (KernelBase.dll) in ToastNotificationsSample.exe: 0x40080201: WinRT originate error (parameters: 0x8001010E, 0x00000051, 0x0793D0D0).
Exception thrown at 0x76137922 in ToastNotificationsSample.exe: Microsoft C++ exception: UNSException at memory location 0x0793D78C.
ToastNotificationsSample.exe has triggered a breakpoint.

Selecting Continue in the exception dialog results in another exception and halts in ViewController.m, line 276.

[Continue]
Unhandled exception at 0x76137922 in ToastNotificationsSample.exe: Microsoft C++ exception: UNSException at memory location 0x0793D78C.

See attached for stack trace information.

[rajsesh]

[External Code]	
LIBOBJC2.DLL!objc_exception_throw(void * object) Line 134	C++
OBJCUWP_WINDOWS_UI_XAML.DLL!wil::details::ReportFailure(void * callerReturnAddress, unsigned int lineNumber, const char * fileName, const char * functionName, const char * code, void * returnAddress, wil::FailureType type, HRESULT hr, const wchar_t * message, details::ReportFailureOptions options) Line 3144	Objective-C++
OBJCUWP_WINDOWS_UI_XAML.DLL!wil::details::ReportFailure_Hr() Line 3165	Objective-C++
OBJCUWP_WINDOWS_UI_XAML.DLL!wil::details::in1diag5::_Objc_Throw_Hr(void * callerReturnAddress, unsigned int lineNumber, const char * fileName, const char * functionName, const char * code, HRESULT hr) Line 4743	Objective-C++
OBJCUWP_WINDOWS_UI_XAML.DLL!-[WXCTextBlock setText:](WXCTextBlock * self, objc_selector * _cmd, NSString * value) Line 4937	Objective-C++
UIKIT.DLL!-[UILabel _updateXamlElement](UILabel * const self, objc_selector * _cmd) Line 161	Objective-C++
UIKIT.DLL!-[UILabel setText:](UILabel * const self, objc_selector * _cmd, NSString *) Line 395	Objective-C++

ToastNotificationsSample.exe!__49-[ViewController actionNotificationButtonPressed]_block_invoke(void * .block_descriptor, WUNToastNotification * args, RTObject * sender) Line 276 Objective-C
OBJCUWP_WINDOWS_RANDOMSTUFF.DLL!ITypedEventHandler_Windows_UI_Notifications_ToastNotification_System_Object::Invoke(Notifications::IToastNotification * arg0, IInspectable * arg1) Line 70 Objective-C++

This seems a bug in UILabel setText, you should open an issue in the Microsoft/winobjc repo.

[jaredhms]

What type of exception is being thrown? It looks like the sample should be pushing the label update to the UI thread.