Adding the reference to a project assembly two times in csproj file crashes docfx

[xenux]

Title

Adding the reference to a project assembly two times in csproj file crashes docfx during metadata extraction.

Functional impact

when editing csproj by hand (or with git automatic merge from two branches) it happens that the reference to the same assembly is added two times. when it happens docfx crash during metadata extraction.

Minimal repro steps

• Create project A.
• Create project B.
• Add reference to project A from project B.
• Save.
• Open B.csproj
• Duplicate following lines:

<ItemGroup>
   <ProjectReference Include="..\A\A.csproj">
     <Project>{046f7d79-105a-4cb1-aa39-5545f82b4b1a}</Project>
     <Name>A</Name>
   </ProjectReference>
 </ItemGroup>

• Use one class of A inside B to be sure nothing is optimized out.
• Build metadata on B.
  -> crash
  stacktrace.txt

Expected result

Second reference should be ignored

Actual result

Argument Exception the same assembly is added two times in a dictionary collection crashing the build
A task was

[vicancy]

Thanks for reporting the issue. We will take a look.

[superyyrrzz]

It's fixed since v2.14

[ElanHasson]

@superyyrrzz this is still an issue, I encountered it with latest version,

[superyyrrzz]

@ElanHasson Could you please open an issue with detailed steps to help us reproduce?