Index: applications/viewer/jmapviewer/test/org/openstreetmap/gui/jmapviewer/TileRangeTest.java
===================================================================
--- applications/viewer/jmapviewer/test/org/openstreetmap/gui/jmapviewer/TileRangeTest.java	(revision 36140)
+++ applications/viewer/jmapviewer/test/org/openstreetmap/gui/jmapviewer/TileRangeTest.java	(revision 36198)
@@ -4,4 +4,5 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import org.junit.jupiter.api.Test;
@@ -21,3 +22,12 @@
                 new TileXY(6, 6), 10).size());
     }
+
+    /**
+     * Ensure that something exceptional happens when an integer overflow happens
+     */
+    @Test
+    void testSizeTooLarge() {
+        final TileRange allZ16 = new TileRange(new TileXY(0, 0), new TileXY(1 << 16, 1 << 16), 16);
+        assertThrows(ArithmeticException.class, allZ16::size);
+    }
 }