Update TypeChecker.fs

dsyme · web-flow · commit c6e03f43679b · 2016-07-06T11:45:17.000+01:00
diff --git a/src/fsharp/TypeChecker.fs b/src/fsharp/TypeChecker.fs
@@ -14138,6 +14138,7 @@ module EstablishTypeDefinitionCores =
         let vis,_ = ComputeAccessAndCompPath envInitial None id.idRange vis parent
              
         let id = ident (modName, id.idRange)
+        CheckForDuplicateModule env id.idText id.idRange
         CheckForDuplicateConcreteType envInitial id.idText im
         CheckNamespaceModuleOrTypeName cenv.g id
 
