'export { undefined }' gives no emit, no error

[DanielRosenwasser]

export { undefined };

I'm not sure whether this should be an error or not, but apart from a "use strict" prologue, the output file is empty.

[mhegazy]

also seeing an error in getSemanticDiagnostics:

getSemanticDiagnostics('C:\test\file1.tsx')

StackTrace:

TypeError: Unable to get property 'kind' of undefined or null reference
   at getRootDeclaration (:5912:16)
   at getDeclarationContainer (:16611:13)
   at checkExportSpecifier (:27482:17)
   at forEach (:921:17)
   at checkExportDeclaration (:27455:21)
   at checkSourceElement (:27676:21)
   at forEach (:921:17)
   at checkSourceFileWorker (:27749:17)
   at checkSourceFile (:27725:13)
   at getDiagnosticsWorker (:27792:17)
   at getDiagnostics (:27783:17)
   at Anonymous function (:39039:17)
   at runWithCancellationToken (:39012:17)
   at getSemanticDiagnosticsForFile (:39032:13)
   at getDiagnosticsHelper (:38987:17)
   at getSemanticDiagnostics (:39002:13)
   at getSemanticDiagnostics (:47600:13)
   at Anonymous function (:52963:17)
   at simpleForwardCall (:52832:9)
   at forwardJSONCall (:52848:13)
   at forwardJSONCall (:52894:13)
   at getSemanticDiagnostics (:52962:13)