Compiler crashing issues reported through internal telemetry

[mkArtakMSFT]

Internal Error - System.NullReferenceException: 개체 참조가 개체의 인스턴스로 설정되지 않았습니다. 위치: Microsoft.AspNetCore.Razor.Language.DefaultRazorTagHelperBinderPhase.ComponentDirectiveVisitor.TrySplitNamespaceAndType(StringSegment fullTypeName, StringSegment& namespace, StringSegment& typeName) 위치: Microsoft.AspNetCore.Razor.Language.DefaultRazorTagHelperBinderPhase.ComponentDirectiveVisitor.IsTagHelperFromMangledClass(TagHelperDescriptor tagHelper) 위치: Microsoft.AspNetCore.Razor.Language.DefaultRazorTagHelperBinderPhase.ComponentDirectiveVisitor..ctor(String filePath, IReadOnlyList`1 tagHelpers, String currentNamespace) -- Another compiler error same as above

More context can be found from: https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1435565

[ghost]

Thanks for contacting us.

We're moving this issue to the .NET 7 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[javiercn]

I have a PR out for this issue, but its unclear how it can manifest itself.

In any case, I replaced the code we use for parsing with the equivalent Roslyn API to discard any "dubious parsing logic" being the source of this issue.

[TanayParikh]

Potentially related to : https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1468241

[javiercn]

We are investigating the underlying cause of this issue as we are seeing some strange behavior going on from the dumps.

[javiercn]

Fixed on ca1728b83851de4211477ab37a2460bf567544d3