VS 2017 Error: ConvertPdbToMdb task failed unexpectedly. PortablePdbNotSupportedException

DanielVaughan

Hi,

I'm referencing a VS 2017 .NET Standard 1.4 project from a Xamarin.iOS project. I'm receiving the following error:

Error The "ConvertPdbToMdb" task failed unexpectedly.
Pdb2Mdb.PortablePdbNotSupportedException: Portable PDB 'My.pdb' can't be converted to mdb. Consider setting the project 'DebugType' property to 'Full'.
at Pdb2Mdb.Converter.Convert(String filename) in C:\d\lanes\4368\73f58d6d\source\xamarinvs\src\MSBuild\Xamarin.iOS.Tasks\Pdb2mdb\Driver.cs:line 43
at Xamarin.iOS.Tasks.ConvertPdbToMdb.Execute() in C:\d\lanes\4368\73f58d6d\source\xamarinvs\src\MSBuild\Xamarin.iOS.Tasks\Tasks\ConvertPdbToMdb.cs:line 26
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.d__26.MoveNext() Codon.Ios

There's a similar issue reported here:
https://forums.xamarin.com/discussion/89921/the-convertpdbtomdb-task-failed-unexpectedly?

Any assistance would be greatly appreciated.

Regards,
Daniel

FrankBuckley

Adding the following to the netstandard library .csproj works around the problem:

  <PropertyGroup>
    <DebugType>full</DebugType>
  </PropertyGroup>

DanielVaughan

I just filed a bug report for this.

JohnMiller

@DanielVaughan,

It seems that the newer PDB format used by netstandard libraries is not supported yet in the toolchain. For clarity, I have filed a bug to track this here: https://bugzilla.xamarin.com/show_bug.cgi?id=53476

FrankBuckley

Adding the following to the netstandard library .csproj works around the problem:

  <PropertyGroup>
    <DebugType>full</DebugType>
  </PropertyGroup>