catching NullPointerException is very bad practice

and makes finding real NPE problems super hard

h2/src/main/org/h2/index/RangeIndex.java

@@ -50,6 +50,7 @@ public class RangeIndex extends BaseIndex {
         long min = rangeTable.getMin(session);
         long max = rangeTable.getMax(session);
         long step = rangeTable.getStep(session);
+        if (first != null) {
             try {
                 long v = first.getValue(0).getLong();
                 if (step > 0) {
@@ -59,9 +60,11 @@ public class RangeIndex extends BaseIndex {
                 } else if (v > max) {
                     max = v;
                 }
-        } catch (Exception e) {
+            } catch (DbException e) {
                 // error when converting the value - ignore
             }
+        }
+        if (last != null) {
             try {
                 long v = last.getValue(0).getLong();
                 if (step > 0) {
@@ -71,9 +74,10 @@ public class RangeIndex extends BaseIndex {
                 } else if (v < min) {
                     min -= (min - v - step - 1) / step * step;
                 }
-        } catch (Exception e) {
+            } catch (DbException e) {
                 // error when converting the value - ignore
             }
+        }
         return new RangeCursor(session, min, max, step);
     }