diff --git a/src/org/joni/StackMachine.java b/src/org/joni/StackMachine.java
index 8a80781b..2975096c 100644
--- a/src/org/joni/StackMachine.java
+++ b/src/org/joni/StackMachine.java
@@ -502,7 +502,7 @@ protected final int nullCheckMemSt(int id, int s) {
                         int endp;
                         isNull = 1;
                         while (k < stk) {
-                        	e = stack[k++];
+                            e = stack[k++];
                             if (e.type == MEM_START) {
                                 if (e.getMemEnd() == INVALID_INDEX) {
                                     isNull = 0;
diff --git a/test/org/joni/test/TestA.java b/test/org/joni/test/TestA.java
index d9403da3..bd95f3e0 100644
--- a/test/org/joni/test/TestA.java
+++ b/test/org/joni/test/TestA.java
@@ -500,6 +500,8 @@ public void test() throws InterruptedException {
 
         x2s("(?<=\\babc)d", " abcd", 4, 5);
         x2s("(?<=\\Babc)d", "aabcd", 4, 5);
+        x2s("([^\\s]+),(.*)+", " xxxx,         xxx xxxxxx xxxxxxxxx xxxxxxx, xxxx xxxxx xxxxx ", 1, 62);
+        x2s(",(.*)+", " xxxx,         xxx xxxxxx xxxxxxxxx xxxxxxx, xxxx xxxxx xxxxx ", 5, 52);
     }
 
     public static void main(String[] args) throws Throwable{