`Dotnet format` crash with `The solution does not contain the specified document.`

[trejjam]

Hi,
since .Net 9.0.0 we can not use dotnet format on our solution.

The command that we are using:

dotnet format -v diag --no-restore whitespace My.sln

and the output:

  The dotnet runtime version is '9.0.1'.
  The dotnet CLI version is '9.0.102'.
  Using MSBuild.exe located in 'C:\Program Files\dotnet\sdk\9.0.102\'.
  Formatting code files in workspace 'D:\asp.net\My.sln'.
  Loading workspace.
Unhandled exception: System.InvalidOperationException: The solution does not contain the specified document.
   at Microsoft.CodeAnalysis.Shared.Extensions.ISolutionExtensions.GetRequiredDocument(Solution solution, DocumentId documentId)
   at Microsoft.CodeAnalysis.Workspace.<SetCurrentSolutionAsync>g__UpdateAddedDocumentToExistingContentsInSolution|27_1(Solution solution, ArrayBuilder`1 addedDocumentIds)
   at Microsoft.CodeAnalysis.Workspace.<SetCurrentSolutionAsync>g__UnifyLinkedDocumentContents|27_0(Solution oldSolution, Solution newSolution)
   at Microsoft.CodeAnalysis.Workspace.<>c.<SetCurrentSolutionAsync>b__27_3(Solution oldSolution, ValueTuple`5 data)
   at Microsoft.CodeAnalysis.Workspace.SetCurrentSolutionAsync[TData](Boolean useAsync, TData data, Func`3 transformation, Boolean mayRaiseEvents, Action`3 onBeforeUpdate, Action`3 onAfterUpdate, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Workspace.SetCurrentSolutionAsync(Boolean useAsync, Func`2 transformation, Func`3 changeKind, Action`2 onBeforeUpdate, Action`2 onAfterUpdate, CancellationToken cancellationToken)
   at Roslyn.Utilities.ValueTaskExtensions.VerifyCompleted[T](ValueTask`1 task, String message)
   at Microsoft.CodeAnalysis.Workspace.SetCurrentSolution(Func`2 transformation, Func`3 changeKind, Action`2 onBeforeUpdate, Action`2 onAfterUpdate)
   at Microsoft.CodeAnalysis.Workspace.SetCurrentSolution(Func`2 transformation, WorkspaceChangeKind changeKind, ProjectId projectId, DocumentId documentId, Action`2 onBeforeUpdate, Action`2 onAfterUpdate)
   at Microsoft.CodeAnalysis.Workspace.OnSolutionAdded(SolutionInfo solutionInfo)
   at Microsoft.CodeAnalysis.MSBuild.MSBuildWorkspace.OpenSolutionAsync(String solutionFilePath, ILogger msbuildLogger, IProgress`1 progress, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Tools.Workspaces.MSBuildWorkspaceLoader.LoadAsync(String solutionOrProjectPath, WorkspaceType workspaceType, String binaryLogPath, Boolean logWorkspaceWarnings, ILogger logger, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Tools.CodeFormatter.OpenMSBuildWorkspaceAsync(String solutionOrProjectPath, WorkspaceType workspaceType, Boolean noRestore, Boolean requiresSemantics, String binaryLogPath, Boolean logWorkspaceWarnings, ILogger logger, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Tools.CodeFormatter.FormatWorkspaceAsync(FormatOptions formatOptions, ILogger logger, CancellationToken cancellationToken, String binaryLogPath)
   at Microsoft.CodeAnalysis.Tools.FormatCommandCommon.FormatAsync(FormatOptions formatOptions, ILogger`1 logger, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Tools.Commands.FormatWhitespaceCommand.FormatWhitespaceHandler.InvokeAsync(ParseResult parseResult, CancellationToken cancellationToken)
   at System.CommandLine.Invocation.InvocationPipeline.InvokeAsync(ParseResult parseResult, CancellationToken cancellationToken)

---

The same command works when only .Net 8 is available

[trejjam]

Let me know if I can provide more specific information :)
The solution starts to be quite big, and I do not know where to look for what causes this error.