What does `Exception: Build system error - indirect recursion detected:` mean?

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1 
2020-08-24 17:29:29.94 [ERROR]  [LanguageServer]  [] 
Unexpected exception on request, please report!
Message: RequestMessage {_jsonrpc = "2.0", _id = IdInt 1083, _method = TextDocumentCodeLens, _params = CodeLensParams {_textDocument = TextDocumentIdentifier {_uri = Uri {getUri = "file:///Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml"}}, _workDoneToken = Nothing}}
Exception: Build system error - indirect recursion detected:
 Key value 1:   OfInterest; 
 Key value 2:   GetDependencyInformation; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Utilities.daml
 Key value 3:   GetLocatedImports; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Utilities.daml
 Key value 4:   GetParsedModule; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Utilities.daml
 Key value 5:   GhcSession; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Utilities.daml
 Key value 6:   GhcSessionIO; 
 Key value 7:   GetParsedModule; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 8:   GhcSession; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 9:   GetDependencyInformation; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 10:  GetLocatedImports; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 11:  GetLocatedImports; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Main.daml
 Key value 12:  GetParsedModule; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Main.daml
 Key value 13:  GhcSession; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Main.daml
 Key value 14:  GetDependencies; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 15:  GetDependencyInformation; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Main.daml
 Key value 16:  GenerateRawDalf; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
Rules may not be recursive

[Error - 7:29:29 PM] Request textDocument/codeLens failed.
 Message: Build system error - indirect recursion detected:
 Key value 1:   OfInterest; 
 Key value 2:   GetDependencyInformation; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Utilities.daml
 Key value 3:   GetLocatedImports; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Utilities.daml
 Key value 4:   GetParsedModule; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Utilities.daml
 Key value 5:   GhcSession; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Utilities.daml
 Key value 6:   GhcSessionIO; 
 Key value 7:   GetParsedModule; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 8:   GhcSession; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 9:   GetDependencyInformation; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 10:  GetLocatedImports; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 11:  GetLocatedImports; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Main.daml
 Key value 12:  GetParsedModule; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Main.daml
 Key value 13:  GhcSession; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Main.daml
 Key value 14:  GetDependencies; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
 Key value 15:  GetDependencyInformation; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Main.daml
 Key value 16:  GenerateRawDalf; /Users/gyorgybalazsi/ven/VEN_DAML/ven-iteration-sixth/daml/Test.daml
Rules may not be recursive

 Code: -32603
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2

That’s a bug in daml studio. We’ve seen this a few times but never managed to reproduce it. If you can reproduce it, please let us know!

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