Symbols cannot be loaded when debugging MSBuild task run from dotnet.exe

[jonathanbyrne]

Steps to reproduce

1. Extract attached zip file (MyTask.zip)
2. Open MyTask.sln in Visual Studio 2017
3. Ensure that the Just-In-Time debugger is enabled for Visual Studio 2017
4. Execute "test-with-dotnet-build.bat" or "test-with-dotnet-msbuild.bat"
5. Choose Visual Studio instance with MyTask solution to debug dotnet.exe

Expected behavior

The debugger should load the symbols for MyTask and allow debugging. Executing "test-with-msbuild.bat" will demonstrated the expected behavior.

Actual behavior

Visual Studio does not load the symbols for MyTask. The modules window states:

The module did not load at the default load address.

When choosing "Symbol Load Information..." from the module context menu, a dialog box states:

This module is a pre-compiled binary created by the ngen.exe tool. The debugger does not attempt to load symbols for these binaries, but will instead load symbols for original dll/exe when it is loaded by the .NET Runtime.

Environment data

Visual Studio Professional 15.4.0 Preview 1.0
MSBuild 15.3.409.57025
Dotnet 2.0.0
NuGet 4.3.0.4406

[steveharter]

@dagood any comments? Thanks

[dagood]

It looks like this is the same issue as https://github.com/dotnet/coreclr/issues/12074: "Debugger.Launch doesn't work correctly on coreclr on Windows"

[steveharter]

OK closing as dup