VS 15.9.7 InvalidOperationException Unexpected Null

[vsfeedback]

Occured in VS 15.9.7

While typing in the IDE I got the follow error: ExtractMethodCodeRefactoringProvider encountered an error and has been disabled. Here is the stacktrace:

System.InvalidOperationException : Unexpected Null
   at Roslyn.Utilities.Contract.ThrowIfNull[T](T value,String message)
   at Microsoft.CodeAnalysis.CSharp.ExtractMethod.CSharpMethodExtractor.CSharpCodeGenerator.ExpressionCodeGenerator.GetCallSiteContainerFromExpression()
   at Microsoft.CodeAnalysis.CSharp.ExtractMethod.CSharpMethodExtractor.CSharpCodeGenerator.ExpressionCodeGenerator.GetOutermostCallSiteContainerToProcess(CancellationToken cancellationToken)
   at async Microsoft.CodeAnalysis.ExtractMethod.MethodExtractor.CodeGenerator`3.GenerateAsync[TStatement,TExpression,TNodeUnderContainer](<Unknown Parameters>)
   at async Microsoft.CodeAnalysis.ExtractMethod.MethodExtractor.ExtractMethodAsync(<Unknown Parameters>)
   at async Microsoft.CodeAnalysis.ExtractMethod.AbstractExtractMethodService`3.ExtractMethodAsync[TValidator,TExtractor,TResult](<Unknown Parameters>)
   at async Microsoft.CodeAnalysis.CodeRefactorings.ExtractMethod.ExtractMethodCodeRefactoringProvider.GetCodeActionAsync(<Unknown Parameters>)
   at async Microsoft.CodeAnalysis.CodeRefactorings.ExtractMethod.ExtractMethodCodeRefactoringProvider.ComputeRefactoringsAsync(<Unknown Parameters>)
   at async Microsoft.CodeAnalysis.CodeRefactorings.CodeRefactoringService.GetRefactoringFromProviderAsync(<Unknown Parameters>)

This issue has been moved from https://developercommunity.visualstudio.com/content/problem/464228/vs-1597-invalidoperationexception-unexpected-null.html
VSTS ticketId: 796901
These are the original issue comments:

Visual Studio Feedback System on 2/21/2019, 00:31 AM (69 days ago):

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