1 files changed, 5 insertions, 0 deletions
diff --git a/Source/cmExportFileGenerator.cxx b/Source/cmExportFileGenerator.cxx
index 002fae6..75d3374 100644
--- a/Source/cmExportFileGenerator.cxx
+++ b/Source/cmExportFileGenerator.cxx
@@ -1174,6 +1174,11 @@ bool cmExportFileGenerator::PopulateExportProperties(
         return false;
       }
       auto propertyValue = targetProperties.GetPropertyValue(prop);
+      if (propertyValue == nullptr) {
+        // Asked to export a property that isn't defined on the target. Do not
+        // consider this an error, there's just nothing to export.
+        continue;
+      }
       std::string evaluatedValue = cmGeneratorExpression::Preprocess(
         propertyValue, cmGeneratorExpression::StripAllGeneratorExpressions);
       if (evaluatedValue != propertyValue) {