From 71fea1fd5ccb76e21942e60a36fff5c355b6a66f Mon Sep 17 00:00:00 2001
From: Craig Taverner <craig@amanzi.com>
Date: Tue, 24 Feb 2026 11:27:21 +0100
Subject: [PATCH 1/2] Added simpler test to focus on the key part that was
 failing

---
 .../apache/lucene/geo/TestTessellator.java    | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/lucene/core/src/test/org/apache/lucene/geo/TestTessellator.java b/lucene/core/src/test/org/apache/lucene/geo/TestTessellator.java
index 295e7929b377..72cb739f3b6e 100644
--- a/lucene/core/src/test/org/apache/lucene/geo/TestTessellator.java
+++ b/lucene/core/src/test/org/apache/lucene/geo/TestTessellator.java
@@ -953,6 +953,28 @@ public void testComplexPolygon64() throws Exception {
     checkMultiPolygon(polygons, 0.0);
   }
 
+  public void testComplexPolygon65() throws Exception {
+    // Simplified extract of the top-left corner of github-15731.geojson.gz:
+    // shell replaced with a bounding rectangle from the top-left-most shell vertex
+    // to a bottom-right cutoff point, with two surviving holes.
+    String geoJson =
+        """
+        {"type": "Polygon", "coordinates": [
+          [
+            [-97.12583, 32.67035], [-97.12466, 32.67035], [-97.12466, 32.6691],
+            [-97.12583, 32.6691], [-97.12583, 32.67035]
+          ], [
+            [-97.125074, 32.669464], [-97.125051, 32.669857], [-97.124884, 32.669819],
+            [-97.124906, 32.669464], [-97.124922, 32.669464], [-97.125074, 32.669464]
+          ], [
+            [-97.124922, 32.669464], [-97.124716, 32.669445], [-97.124739, 32.669128],
+            [-97.124906, 32.669128], [-97.124922, 32.669464]
+          ]
+        ]}""";
+    Polygon[] polygons = Polygon.fromGeoJSON(geoJson);
+    checkMultiPolygon(polygons, 0.0);
+  }
+
   private static class TestCountingMonitor implements Tessellator.Monitor {
     private int count = 0;
     private int splitsStarted = 0;

From a5bde98a780a689a3a405d84a5e5e00903210752 Mon Sep 17 00:00:00 2001
From: Craig Taverner <craig@amanzi.com>
Date: Tue, 24 Feb 2026 17:37:39 +0100
Subject: [PATCH 2/2] Add changes entry

---
 lucene/CHANGES.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index 824e4cb86b8b..ff587a512d29 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -247,6 +247,8 @@ Other
 ---------------------
 * GITHUB#15586: Document that scoring and ranking may change across major Lucene versions, and that applications requiring stable ranking should explicitly configure Similarity. (Parveen Saini)
 
+* GITHUB#15764: Added simpler TestTesselator test in support of fix GITHUB#15731. (Craig Taverner)
+
 ======================= Lucene 10.4.0 =======================
 
 API Changes