Brace completion exception in Code Analysis (Version: 18.3.0 Insiders [11114.75.main])

Hit an exception from Microsoft.CodeAnalysis.Workspaces.dll!Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation.IndentBlockOperation when typing something stupid.

Type [ here (after foreach on line 21):

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Get:

  | Name | Value | Type
-- | -- | -- | --
◢ | $exception | {"Unexpected false - file IndentBlockOperation.cs line 38"} | System.InvalidOperationException
  | ▶ Data | {System.Collections.ListDictionaryInternal} | System.Collections.IDictionary {System.Collections.ListDictionaryInternal}
  | HResult | -2146233079 | int
  | HelpLink | null | string
  | IPForWatsonBuckets | 0x00007ffdc01e46d5 | System.UIntPtr
  | ▶ InnerException | null | System.Exception
  | IsTransient | false | bool
  | Message | "Unexpected false - file IndentBlockOperation.cs line 38" | string
  | RemoteStackTrace | null | string
  | Source | "Microsoft.CodeAnalysis.Workspaces" | string
  | StackTrace | " at Microsoft.CodeAnalysis.Contract.Fail(String message, Int32 lineNumber, String filePath) in /_/src/Dependencies/Contracts/Contract.cs:line 161" | string
  | ▶ TargetSite | {Void Fail(System.String, Int32, System.String)} | System.Reflection.MethodBase {System.Reflection.RuntimeMethodInfo}
  | WatsonBuckets | null | object
  | _HResult | -2146233079 | int
  | _className | null | string
  | ▶ _data | {System.Collections.ListDictionaryInternal} | System.Collections.IDictionary {System.Collections.ListDictionaryInternal}
  | _dynamicMethods | null | object
  | _exceptionMethod | null | System.Reflection.MethodBase
  | _exceptionMethodString | null | string
  | _helpURL | null | string
  | ▶ _innerException | null | System.Exception
  | _ipForWatsonBuckets | 0x00007ffdc01e46d5 | System.UIntPtr
  | _message | "Unexpected false - file IndentBlockOperation.cs line 38" | string
  | _remoteStackIndex | 0 | int
  | _remoteStackTraceString | null | string
  | ▶ _safeSerializationManager | {System.Runtime.Serialization.SafeSerializationManager} | System.Runtime.Serialization.SafeSerializationManager
  | _source | "Microsoft.CodeAnalysis.Workspaces" | string
  | ▶ _stackTrace | {sbyte[48]} | object {sbyte[]}
  | _stackTraceString | null | string
  | _watsonBuckets | null | object
  | _xcode | -532462766 | int
  | _xptrs | 0x0000000000000000 | System.IntPtr

 

 

> Microsoft.CodeAnalysis.Workspaces.dll!Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation.IndentBlockOperation(Microsoft.CodeAnalysis.SyntaxToken
baseToken, Microsoft.CodeAnalysis.SyntaxToken startToken,
Microsoft.CodeAnalysis.SyntaxToken endToken,
Microsoft.CodeAnalysis.Text.TextSpan textSpan, int indentationDelta,
Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOption option) Line 53 C#

Microsoft.CodeAnalysis.CSharp.Workspaces.dll!Microsoft.CodeAnalysis.CSharp.Formatting.IndentBlockFormattingRule.AddBracketIndentationOperation(System.Collections.Generic.List<Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation>
list, Microsoft.CodeAnalysis.SyntaxNode node)    Unknown

Microsoft.CodeAnalysis.CSharp.Workspaces.dll!Microsoft.CodeAnalysis.CSharp.Formatting.IndentBlockFormattingRule.AddIndentBlockOperations(System.Collections.Generic.List<Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation>
list, Microsoft.CodeAnalysis.SyntaxNode node,
Microsoft.CodeAnalysis.Formatting.Rules.NextIndentBlockOperationAction
nextOperation)               
Unknown

Microsoft.CodeAnalysis.Workspaces.dll!Microsoft.CodeAnalysis.Formatting.Rules.NextIndentBlockOperationAction.Invoke()
Line
30              
C#

Microsoft.CodeAnalysis.CSharp.Workspaces.dll!Microsoft.CodeAnalysis.CSharp.Formatting.IndentUserSettingsFormattingRule.AddIndentBlockOperations(System.Collections.Generic.List<Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation>
list, Microsoft.CodeAnalysis.SyntaxNode node,
Microsoft.CodeAnalysis.Formatting.Rules.NextIndentBlockOperationAction
nextOperation)               
Unknown

Microsoft.CodeAnalysis.Workspaces.dll!Microsoft.CodeAnalysis.Formatting.Rules.NextIndentBlockOperationAction.Invoke()
Line
30              
C#

Microsoft.CodeAnalysis.Workspaces.dll!Microsoft.CodeAnalysis.Formatting.ChainedFormattingRules.AddIndentBlockOperations(System.Collections.Generic.List<Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation>
list, Microsoft.CodeAnalysis.SyntaxNode currentNode) Line 61 C#

Microsoft.CodeAnalysis.Workspaces.dll!Microsoft.CodeAnalysis.Formatting.AbstractFormatEngine.AddOperations<Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation>(Microsoft.CodeAnalysis.Collections.SegmentedList<Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation>
operations,
System.Collections.Generic.List<Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation>
scratch, Microsoft.CodeAnalysis.SyntaxNode node,
System.Action<System.Collections.Generic.List<Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation>,
Microsoft.CodeAnalysis.SyntaxNode> addOperations) Line
193              
C#

Microsoft.CodeAnalysis.Workspaces.dll!Microsoft.CodeAnalysis.Formatting.AbstractFormatEngine.CreateNodeOperations(System.Threading.CancellationToken
cancellationToken) Line 175 C#

Microsoft.CodeAnalysis.Workspaces.dll!Microsoft.CodeAnalysis.Formatting.AbstractFormatEngine.Format(System.Threading.CancellationToken
cancellationToken) Line 118 C#

Microsoft.CodeAnalysis.CSharp.Workspaces.dll!Microsoft.CodeAnalysis.CSharp.Formatting.CSharpSyntaxFormatting.Format(Microsoft.CodeAnalysis.SyntaxNode
node, Microsoft.CodeAnalysis.Formatting.SyntaxFormattingOptions options,
System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.Formatting.Rules.AbstractFormattingRule>
formattingRules, Microsoft.CodeAnalysis.SyntaxToken startToken,
Microsoft.CodeAnalysis.SyntaxToken endToken, System.Threading.CancellationToken
cancellationToken)     Unknown

Microsoft.CodeAnalysis.Workspaces.dll!Microsoft.CodeAnalysis.Formatting.AbstractSyntaxFormatting.GetFormattingResult(Microsoft.CodeAnalysis.SyntaxNode
node,
System.Collections.Generic.IEnumerable<Microsoft.CodeAnalysis.Text.TextSpan>
spans, Microsoft.CodeAnalysis.Formatting.SyntaxFormattingOptions options,
System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.Formatting.Rules.AbstractFormattingRule>
rules, System.Threading.CancellationToken cancellationToken) Line
62              
C#

Microsoft.CodeAnalysis.CSharp.Features.dll!Microsoft.CodeAnalysis.CSharp.BraceCompletion.AbstractCurlyBraceOrBracketCompletionService.FormatTrackingSpan(Microsoft.CodeAnalysis.ParsedDocument
document, int openingPoint, int closingPoint, System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.Formatting.Rules.AbstractFormattingRule>
braceFormattingIndentationRules,
Microsoft.CodeAnalysis.Indentation.IndentationOptions options,
System.Threading.CancellationToken cancellationToken)               
Unknown

Microsoft.CodeAnalysis.CSharp.Features.dll!Microsoft.CodeAnalysis.CSharp.BraceCompletion.AbstractCurlyBraceOrBracketCompletionService.GetTextChangesAfterCompletion(Microsoft.CodeAnalysis.BraceCompletion.BraceCompletionContext
context, Microsoft.CodeAnalysis.Indentation.IndentationOptions options,
System.Threading.CancellationToken
cancellationToken)               
Unknown

Microsoft.CodeAnalysis.EditorFeatures.dll!Microsoft.CodeAnalysis.AutomaticCompletion.BraceCompletionSessionProvider.BraceCompletionSession.TryStartAsync(System.Threading.CancellationToken
cancellationToken)     Unknown

Microsoft.VisualStudio.Threading.dll!Microsoft.VisualStudio.Threading.JoinableTaskFactory.ExecuteJob<bool>(System.Func<System.Threading.Tasks.Task>
asyncMethod, Microsoft.VisualStudio.Threading.JoinableTask
job)          Unknown

Microsoft.VisualStudio.Threading.dll!Microsoft.VisualStudio.Threading.JoinableTaskFactory.RunAsync<bool>(System.Func<System.Threading.Tasks.Task<bool>>
asyncMethod, bool synchronouslyBlocking, string parentToken,
Microsoft.VisualStudio.Threading.JoinableTaskCreationOptions
creationOptions)       Unknown

Microsoft.VisualStudio.Threading.dll!Microsoft.VisualStudio.Threading.JoinableTaskFactory.Run<bool>(System.Func<System.Threading.Tasks.Task<bool>>
asyncMethod, Microsoft.VisualStudio.Threading.JoinableTaskCreationOptions
creationOptions)               
Unknown

Microsoft.CodeAnalysis.EditorFeatures.dll!Microsoft.CodeAnalysis.AutomaticCompletion.BraceCompletionSessionProvider.BraceCompletionSession.Start()               
Unknown

Microsoft.VisualStudio.Platform.VSEditor.dll!Microsoft.VisualStudio.Text.BraceCompletion.Implementation.BraceCompletionStack.PushSession.AnonymousMethod__1()
Line
78              
C#

Reproduce the exception by typing [ after foreach on line 21 in the reported C# scenario. Start by examining Microsoft.CodeAnalysis.Workspaces.dll and Microsoft.CodeAnalysis.Formatting.Rules.IndentBlockOperation, then identify the failing formatting path. Done means the same input no longer throws an exception.

Written by the indexing model from the issue text.