System.ArgumentOutOfRangeException: 'end' must not be less than 'start' in CSharpStructureHelpers.cs:286

[KirillOsenkov]

Version Used:
Roslyn that shipped in VS 17.2.5

In this line:

roslyn/src/Features/CSharp/Portable/Structure/CSharpStructureHelpers.cs

Line 286 in b7a5eaa

var hintTextEndToken = GetHintTextEndToken(node);

hintTextEndToken is default (for node internal record PdbFilePathResult(string PdbFilePath);), so hintSpan: TextSpan.FromBounds(startPosition, hintTextEndToken.Span.End) is getting passed the startPosition and 0, which results in this exception when invoking Go To Definition on an interface defined in metadata, for which we have source link.

System.ArgumentOutOfRangeException: 'end' must not be less than 'start'
Parameter name: end
   at Microsoft.CodeAnalysis.Text.TextSpan.FromBounds(Int32 start, Int32 end) in C:\Roslyn\src\Compilers\Core\Portable\Text\TextSpan.cs:line 194

	Microsoft.CodeAnalysis	TextSpan.FromBounds Line 194
	Microsoft.CodeAnalysis.CSharp.Features	CSharpStructureHelpers.<CollectCommentBlockSpans>g__TryGetLeadingCollapsibleSpan|12_0 Line 287
	Microsoft.CodeAnalysis.CSharp.Features	CSharpStructureHelpers.CollectCommentBlockSpans Line 254
	Microsoft.CodeAnalysis.CSharp.Features	TypeDeclarationStructureProvider.CollectBlockSpans Line 26
	Microsoft.CodeAnalysis.Features	AbstractSyntaxNodeStructureProvider`1.CollectBlockSpans Line 34
	Microsoft.CodeAnalysis.Features	BlockSpanCollector.GetBlockSpans Line 66
	Microsoft.CodeAnalysis.Features	BlockSpanCollector.Collect Line 56
	Microsoft.CodeAnalysis.Features	BlockSpanCollector.CollectBlockSpans Line 41
	Microsoft.CodeAnalysis.Features	AbstractBlockStructureProvider.ProvideBlockStructure Line 42
	Microsoft.CodeAnalysis.Features	BlockStructureServiceWithProviders.GetBlockStructure Line 80
	Microsoft.CodeAnalysis.Features	BlockStructureServiceWithProviders.<GetBlockStructureAsync>d__5.MoveNext Line 56