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UWP or Xaml Island app crashes on pressing the clear button in the hex Input textbox in ColorPicker

See original GitHub issue

Describe the bug

If a ColorPicker element is declared with the muxc namespace as in the following snippet, then the entire app crashes without any exception trace on clicking the clear button on the hex input box. This can also be reproduced on the Xaml Controls Gallery repository.

Steps to reproduce the bug

Steps to reproduce the behavior:

Run Xaml Controls Gallery and open the Color Picker page (https://github.com/microsoft/Xaml-Controls-Gallery/blob/master/XamlControlsGallery/ControlPages/ColorPickerPage.xaml, reproduced on commit https://github.com/microsoft/Xaml-Controls-Gallery/commit/9e87c2feace4da6a2eef66aa07181a0c0cf1ce0b)
Click on the X button on the hex input textbox

Expected behavior

String gets cleared.

Screenshots

GIF that shows the crash on Xaml Controls Gallery. winUICrash

Version Info

NuGet package version:

Microsoft.UI.Xaml 2.5.0-prerelease.200812001

Windows app type:

UWP	Win32

Windows 10 version	Saw the problem?
Insider Build (xxxxx)
May 2020 Update (19041)	Yes
November 2019 Update (18363)	Yes
May 2019 Update (18362)
October 2018 Update (17763)
April 2018 Update (17134)
Fall Creators Update (16299)
Creators Update (15063)

Device form factor	Saw the problem?
Desktop	Yes
Xbox
Surface Hub
IoT

Additional context

Link to issue on PowerToys repository: https://github.com/microsoft/PowerToys/issues/6022. We are using WinUI in a Xaml Island, and hence require the pre-release version with the latest changes.

After a lot of trial and error, I found that this seems to happen only if the ColorPicker is referenced with the muxc prefix. If I removed muxc: and used <XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls"/> in the App.xaml ResourceDictionary, I could no longer reproduce the crash. When the crash occurs, the application exits with error code 0xc000041d.

Issue Analytics

State:
Created 3 years ago
Comments:7 (5 by maintainers)

Top GitHub Comments

2reactions

Felix-Devcommented, Aug 31, 2020

@ranjeshj Yes, already added one. Will also look into creating test coverage for this. If it’s fine with you I’d create a PR tomorrow.

1reaction

ranjeshjcommented, Sep 1, 2020

@ranjeshj when can we expect a pre-release with this fix?

@arjunbalgovind assuming the fix goes in before the next pre-release, it should be available in the next pre-release (couple of weeks time).

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