VS Debugger does not retrieve source code from Bitbucket Data Center

[tj-mkunz]

For several days I have been trying to get Source Link to work with my company's Bitbucket Data Center instance, but with no success so far.

The package
I have created a NuGet package "sourceLinkTest" with the following project file (some details replaced by [...]):

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
    <Title>Use to verify Source Link functionality</Title>
    <SignAssembly>False</SignAssembly>
    <AssemblyVersion>1.0.5</AssemblyVersion>
    <FileVersion>$(AssemblyVersion)</FileVersion>
    <Version>$(AssemblyVersion)</Version>
    <Company>[...]</Company>
    <RepositoryUrl>https://bitbucket.[...]/scm/tjcomplayg/sourcelinktest.git</RepositoryUrl>
    <RepositoryType>git</RepositoryType>
    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
    <IncludeSymbols>False</IncludeSymbols>
    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <DebugType>embedded</DebugType>
    <EmbedUntrackedSources>true</EmbedUntrackedSources>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
    <DebugType>none</DebugType>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.SourceLink.Bitbucket.Git" Version="8.0.0">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
  </ItemGroup>

</Project>

The resulting package looks fine in the NuGet Package Explorer:

• Health -> Source Link: Valid
• Repository -> Type: git
• Repository -> Url: https://bitbucket.[...]/projects/tjcomplayg/repos/sourcelinktest/browse
• Package contents -> sourceLinkTest.dll -> PDB Sources contains https://bitbucket.[...]/projects/tjcomplayg/repos/sourcelinktest/raw/ExceptionalClass.cs?at=aa00542ad8ee5d37a1ff69ac6a128dc6f88c1289. In a browser, this URL yields the raw source code of the file ExceptionalClass.cs, provided that I am authenticated via SSO.

The sourcelink CLI tool gives mixed results:

PS C:\Temp> sourcelink print-urls .\sourceLinkTest.dll
68c4166a442cfa9751843e5e2d5d9c06414ba32666fed9f4c64a1a7e114c8b5f sha256 csharp /_/ExceptionalClass.cs
https://bitbucket.[...]/projects/tjcomplayg/repos/sourcelinktest/raw/ExceptionalClass.cs?at=aa00542ad8ee5d37a1ff69ac6a128dc6f88c1289
f3f134e9e825e3e7268090f58b1af2bda2de513f61a09c56f48b9b8d08612abc sha256 csharp /_/obj/Debug/net8.0/sourceLinkTest.GlobalUsings.g.cs
embedded
f7a5d9789c863625e139ff99e1113a503830f6b85a88f6129916df83ac76b49e sha256 csharp /_/obj/Debug/net8.0/.NETCoreApp,Version=v8.0.AssemblyAttributes.cs
embedded
40a4271744bf84ef21d98d0c91d7dd61bb4f10d5394df12fb2983a610dda5d76 sha256 csharp /_/obj/Debug/net8.0/sourceLinkTest.AssemblyInfo.cs
embedded

looks fine, but

PS C:\Temp> sourcelink test .\sourceLinkTest.dll
1 Documents with errors:
68c4166a442cfa9751843e5e2d5d9c06414ba32666fed9f4c64a1a7e114c8b5f sha256 csharp /_/ExceptionalClass.cs
https://bitbucket.[...]/projects/tjcomplayg/repos/sourcelinktest/raw/ExceptionalClass.cs?at=aa00542ad8ee5d37a1ff69ac6a128dc6f88c1289
error: url hash does not match: 68c4166a442cfa9751843e5e2d5d9c06414ba32666fed9f4c64a1a7e114c8b5f
sourcelink test failed

does not. I assume that the authentication is the problem here.

The application
Project file of my .NET 8.0 test application:

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net8.0-windows</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
    <UseWPF>true</UseWPF>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="sourceLinkTest" Version="1.0.5" />
  </ItemGroup>

</Project>

When the app is loaded, I call a constructor from sourceLinkTest that throws an exception. For my tests I start my app with the Visual Studio Debugger attached.

Expectation
When the exception is thrown, the debugger displays the code containing the throw statement (= source code of the package).

Observation
When the exception is thrown, the highlighted line is where the constructor is called (= source code of the app), not the place where the exception is thrown (= source code of the package). If I "Go to [the] definition" of the constructor, I see disassembled code, not the original source.

Debug output
I see zero output related to Source Link in the Debug output pane, especially no HTTP status code.
However, for about two seconds a dialog is displayed saying

Locating Source
The debugger is locating source files. Please wait.
/ _/ExceptionalClass.cs"

Do you have any suggestions how to further debug this issue and get Source Link working?

[tmat]

@chuckries

[chuckries]

@tj-mkunz BitBucket is not officially supported in any capacity, but has worked in the past. I am not familiar with the current state of BitBucket Data Center auth mechanics. One thing you can try is to enable the Debug > Options > General > Fall back to Git Credential Manager authentication for Source Link request. A helpful artifact would be a network trace (like fiddler) to see exactly what VS is sending for auth and how BitBucket is failing.