avoid seg fault

1 files changed, 1 insertions, 1 deletions

diff --git a/document/src/vespa/document/fieldvalue/structuredfieldvalue.cpp b/document/src/vespa/document/fieldvalue/structuredfieldvalue.cpp
index be535a416a1..1ccaa77ac72 100644
--- a/document/src/vespa/document/fieldvalue/structuredfieldvalue.cpp
+++ b/document/src/vespa/document/fieldvalue/structuredfieldvalue.cpp
@@ -118,7 +118,7 @@ StructuredFieldValue::onIterateNested(PathRange nested, IteratorHandler & handle
             const Field & field = fpe.getFieldRef();
             FieldValue::UP value = getValue(field, FieldValue::UP());
             LOG(spam, "fieldRef = %s", field.toString().c_str());
-            LOG(spam, "fieldValueToSet = %s", value->toString().c_str());
+            LOG(spam, "fieldValueToSet = %s", value ? value->toString().c_str() : "<null>");
             ModificationStatus status = ModificationStatus::NOT_MODIFIED;
             if (value) {
                 status = value->iterateNested(nested.next(), handler);