Bug 57311 - ToolbarItem without icon throws exception in UWP when the rootelement is something other than a Frame
Summary: ToolbarItem without icon throws exception in UWP when the rootelement is some...
Status: CONFIRMED
Alias: None
Product: Forms
Classification: Xamarin
Component: Windows ()
Version: 2.3.4
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2017-06-09 10:14 UTC by TheBigRic
Modified: 2017-06-21 13:26 UTC (History)
2 users (show)

Tags: ac, uwp, toolbaritem
Is this bug a regression?: ---
Last known good build:

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Status:
CONFIRMED

Description TheBigRic 2017-06-09 10:14:14 UTC
# Steps to reproduce
I created a repo of the issue here: https://github.com/TheBigRic/UWP-Xamarin-test

Basically the reproduction is creating a master-detail example from the VS2017 templates. 
Change the template code in App.xaml.cs of the UWP project from this:

Frame rootFrame = Window.Current.Content as Frame;

if (rootFrame == null)
{
    rootFrame = new Frame();
    Xamarin.Forms.Forms.Init(e);
    Window.Current.Content = rootFrame;
}

if (rootFrame.Content == null)
{
    rootFrame.Navigate(typeof(MainPage), e.Arguments);
}
Window.Current.Activate();

to this:

Xamarin.Forms.Forms.Init(e);
Window.Current.Content = new MainPage();
Window.Current.Activate();

Hit F5

The App will crash with an unhandled exception, without stacktrace nor inner exceptions. 
The exception is a `DirectoryNotFoundException` with as message:
The system cannot find the path specified.
E_UNKNOWN_ERROR

When an icon is specified for the ToolBarItem it will work when the rootelement is a page.

The same setup with a UWP native App works without setting an icon and the root is a page.
Comment 1 Jimmy [MSFT] 2017-06-09 22:21:55 UTC
Thank you for filing this report! I am able to reproduce this issue with the GitHub project in the description. I tested with 2.3.4.247 and 2.3.5-pre5 and it crashed on both. I am confirming this report so we can investigate further.