Fix ResultWithPaddedStrings and TestValue

h2/src/main/org/h2/result/ResultWithPaddedStrings.java

@@ -65,7 +65,7 @@ public class ResultWithPaddedStrings implements ResultInterface {
                     precision = 1;
                 }
                 String s = row[i].getString();
-                if (s.length() < precision) {
+                if (s != null && s.length() < precision) {
                     /*
                      * Use ValueString to avoid truncation of spaces. There is
                      * no difference between ValueStringFixed and ValueString

h2/src/test/org/h2/test/unit/TestValue.java

@@ -414,7 +414,11 @@ public class TestValue extends TestDb {
 
         ValueJavaObject voString = ValueJavaObject.getNoCopy(
                 new String("This is not a ValueUuid object"), null, null);
-        assertThrows(DbException.class, voString).convertTo(Value.UUID);
+        try {
+            voString.convertTo(Value.UUID);
+            fail();
+        } catch (DbException expected) {
+        }
     }
 
     private void testModulusDouble() {