don't call accentDrop at all for empty input

1 files changed, 3 insertions, 0 deletions

diff --git a/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/NormalizeExpression.java b/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/NormalizeExpression.java
index 78a7a858aba..fa68d45d110 100644
--- a/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/NormalizeExpression.java
+++ b/indexinglanguage/src/main/java/com/yahoo/vespa/indexinglanguage/expressions/NormalizeExpression.java
@@ -43,6 +43,9 @@ public final class NormalizeExpression extends Expression {
     protected void doExecute(ExecutionContext context) {
         Transformer transformer = linguistics.getTransformer();
         var orig = String.valueOf(context.getValue());
+        if (orig.isEmpty()) {
+            return; // must be a no-op for all linguistics/language combinations
+        }
         var lang = context.resolveLanguage(linguistics);
         var transformed = transformer.accentDrop(orig, lang);
         try {