1 files changed, 6 insertions, 0 deletions
diff --git a/Source/cmGeneratorExpressionEvaluator.cxx b/Source/cmGeneratorExpressionEvaluator.cxx
index cbea1d9..cd4b7d8 100644
--- a/Source/cmGeneratorExpressionEvaluator.cxx
+++ b/Source/cmGeneratorExpressionEvaluator.cxx
@@ -435,6 +435,9 @@ static const struct TargetPropertyNode : public cmGeneratorExpressionNode
     case cmGeneratorExpressionDAGChecker::CYCLIC_REFERENCE:
       // No error. We just skip cyclic references.
       return std::string();
+    case cmGeneratorExpressionDAGChecker::ALREADY_SEEN:
+      // No error. We're not going to find anything new here.
+      return std::string();
     case cmGeneratorExpressionDAGChecker::DAG:
       break;
       }
@@ -705,6 +708,9 @@ private:
     case cmGeneratorExpressionDAGChecker::CYCLIC_REFERENCE:
       // No error. We just skip cyclic references.
       return std::string();
+    case cmGeneratorExpressionDAGChecker::ALREADY_SEEN:
+      // No error. We're not going to find anything new here.
+      return std::string();
     case cmGeneratorExpressionDAGChecker::DAG:
       break;
       }