From 7f147fece08363dc13f0dbdf51a849de7e93cce3 Mon Sep 17 00:00:00 2001
From: Peter Gromov <peter@jetbrains.com>
Date: Wed, 7 Apr 2021 14:52:36 +0200
Subject: [PATCH] LUCENE-9894: Hunspell: add user-friendly diagnostics for
 morph data API misuse (#51)

---
 .../java/org/apache/lucene/analysis/hunspell/Dictionary.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lucene/analysis/common/src/java/org/apache/lucene/analysis/hunspell/Dictionary.java b/lucene/analysis/common/src/java/org/apache/lucene/analysis/hunspell/Dictionary.java
index 2be818812b1..2e83145ba2f 100644
--- a/lucene/analysis/common/src/java/org/apache/lucene/analysis/hunspell/Dictionary.java
+++ b/lucene/analysis/common/src/java/org/apache/lucene/analysis/hunspell/Dictionary.java
@@ -551,8 +551,9 @@ public class Dictionary {
 
       @Override
       public List<String> getMorphologicalValues(int entryIndex, String key) {
-        assert key.length() == 3;
-        assert key.charAt(2) == ':';
+        assert key.length() == 3 && key.charAt(2) == ':'
+            : "A morphological data key should consist of two letters followed by a semicolon, found: "
+                + key;
 
         String fields = getMorphologicalData(entryIndex);
         if (fields.isEmpty() || !fields.contains(key)) return Collections.emptyList();