.net 5 trimming causes crash on copying text

[CarbonNeuron]

• .NET Core Version: 5.0.101
• Windows version: 20H2
• Does the bug reproduce also in WPF for .NET Framework 4.8?: No
• Is this bug related specifically to tooling in Visual Studio (e.g. XAML Designer, Code editing, etc...)? No
• Security issues and bugs should be reported privately, learn more via our responsible disclosure guidelines.

Problem description: I am building a self-contained trimmed publish release of a project using .net 5, and using trimming. If you try to copy from the Text boxes in the GUI it will crash. This only happens with trimming.

Actual behavior:
Faulting application name: TestWPF.exe, version: 1.0.0.0, time stamp: 0x5fbf1139 Faulting module name: ntdll.dll, version: 10.0.19041.662, time stamp: 0x5f641e44 Exception code: 0xc0000409 Fault offset: 0x00087160 Faulting process id: 0x342c Faulting application start time: 0x01d6cfff6daa978a Faulting application path: C:\Users\Carbon\source\repos\TestWPF\TestWPF\bin\Release\net5.0-windows\publish\TestWPF.exe Faulting module path: C:\Windows\SYSTEM32\ntdll.dll Report Id: e5c5c421-412f-4a5f-aa52-d412120410da Faulting package full name: Faulting package-relative application ID:

Expected behavior: it copies the text to clipboard.

Minimal repro: https://github.com/CarbonNeuron/WPFCopyCrash make sure to run the published file and not the debug one.

[daisyTian0517]

I checked your .csproj file and add <PublishTrimmed>true</PublishTrimmed> to PropertyGroup, then published the app refer to the steps in Publish a single file app - Visual Studio. There is no problem for copies of the text to clipboard or copies of the text from clipboard with trimming.

[CarbonNeuron]

But there is already publish trimmed in the publish profile.
Could you please fork my repo and show the changes you made?

[daisyTian0517]

I didn't see <PublishTrimmed>true</PublishTrimmed> in your csproj and update csproj as below:
<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop"> <PropertyGroup> <OutputType>WinExe</OutputType> <TargetFramework>net5.0-windows</TargetFramework> <UseWPF>true</UseWPF> <TrimMode>link</TrimMode> <PublishTrimmed>true</PublishTrimmed> <IncludeNativeLibrariesForSelfExtract>true</IncludeNativeLibrariesForSelfExtract> </PropertyGroup> <ItemGroup> <TrimmerRootAssembly Include="System.Runtime" /> <TrimmerRootAssembly Include="System.Runtime.Extensions" /> </ItemGroup> </Project>

[CarbonNeuron]

I have updated my repo to show the code you have shown. After publishing and running the file it has the same issue.

[CarbonNeuron]

TestWPF.zip
This is the assembly that is built when trimming. Please upload your assembly if it works.

[daisyTian0517]

Did you clean and rebuild your project after the update?Did you try to publish your project in other device?By the way, my visual studio version is 16.8.1.Here is my file.

[CarbonNeuron]

Your file is 142MB, which is not trimmed. My file is 70MB. Make sure you are using the publish profile and not just building.

But yes, if you don't trim, it will work fine. But this is not the issue.

[daisyTian0517]

I get the exe in the publish folder like below shown,please point out if I misunderstand.

[CarbonNeuron]

The csproj does not matter. Make sure you are publishing it using the publish profile. You should get console output while building that says you are trimming. And it should take abnormally long to "build"

[daisyTian0517]

The Member-Level Trimming part points out: Member-level trimming(<TrimMode>Link</TrimMode>) has more risk than assembly level trimming, and so is being released as an experimental feature, that is not yet ready for mainstream adoption.

[CarbonNeuron]

While true, should we not still report these bugs somewhere?

[ryalanms]

@CarbonNeuron: Thank you for the report. WPF has not done any work to support trimming yet.

Please continue reporting any issues. All of this feedback is taken in to account during planning for the next release.