Merge pull request #905 from houlongchao/master

add null check in match function

main/SS/Formula/Functions/Match.cs

@@ -1,4 +1,4 @@
-/*
+/*
 * Licensed to the Apache Software Foundation (ASF) Under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for Additional information regarding copyright ownership.
@@ -243,6 +243,12 @@ private static int FindIndexOfValue(ValueEval lookupValue, ValueVector lookupRan
  for (int i = 0; i < size; i++)
  {
  var item = lookupRange.GetItem(i) as NumericValueEval;
+ if (item == null)
+ {
+ // not a number, skip it
+ continue;
+ }
+
  if (lookupComparer.CompareTo(item).IsEqual)
  {
  return i;