TRegex: fix in-buffer copy in CounterTrackerList#removeMaxValue

Author: djoooooe

regex/src/com.oracle.truffle.regex.test/src/com/oracle/truffle/regex/tregex/test/OracleDBTests.java

@@ -1665,6 +1665,7 @@ public void generatedTests() {
                         "axaxeageagageaxeaxeaxageaxagageaxeaxagageagaxaxeagaxeaxagagaxeagageaxeaxeagageaxeaxagaxaxaxageageagageagaxaxaxageaxageaxeageaxaxaxaxaxagaxagageaxeageageageaxeaxeaxageaxaxeaxeagaxagageaxeageaxeaxaxeaxageaxaxeagaxageageaz",
                         0, false);
         test("(a{1100,1100})\\1", "i", "a".repeat(2400), 0, true, 0, 2200, 0, 1100);
+        test("[a]\\S{213,213}bcdz", "", "a".repeat(215) + ("bcxd" + "a".repeat(213)).repeat(3), 0, false);
 
         /* GENERATED CODE END - KEEP THIS MARKER FOR AUTOMATIC UPDATES */
     }

regex/src/com.oracle.truffle.regex/src/com/oracle/truffle/regex/tregex/nodes/dfa/CounterTrackerList.java

@@ -297,7 +297,7 @@ private void incAll(int sId, long[] fixedData, int[][] intArrays) {
      */
     private void removeMaxValue(int sId, long[] fixedData, int[] buffer, int start, int size) {
         if (start >= MAX_UNUSED_BUFFER_SPACE) {
-            System.arraycopy(buffer, start, buffer, 0, size - 1);
+            System.arraycopy(buffer, start + 1, buffer, 0, size - 1);
             setStart(sId, fixedData, 0);
         } else {
             setStart(sId, fixedData, start + 1);