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  1. JDK
  2. JDK-8278940

test failed with unexpected ArrayIndexOutOfBoundsException

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      Description

      A DESCRIPTION OF THE PROBLEM :
      We generate a unit test automatically, and the test failed. The test case is as below:


      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
       @Test
        public void test_setTo(){
            long long1 = 1L;
            long long2 = 0L;
            jdk.nashorn.internal.runtime.BitVector bitVector0 = new jdk.nashorn.internal.runtime.BitVector(long2);
            bitVector0.setTo(long1);
        }

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      do not throw ArrayIndexOutOfBoundsException
      ACTUAL -
      java.lang.ArrayIndexOutOfBoundsException: 0

      at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.BitVector.setTo(BitVector.java:169)


      ---------- BEGIN SOURCE ----------
      /**
           * Sets all bits in the vector up to the length.
           *
           * @param length max bit where to stop setting bits
           */
      public void setTo(final long length) {
              if (0 < length) {
                  final int lastWord = (int)(length >> BITSHIFT);
                  final long lastBits = (1L << (int)(length & BITMASK)) - 1L;
                  Arrays.fill(bits, 0, lastWord, ~0L);

                  if (lastBits != 0L) {
                      bits[lastWord] |= lastBits;
                  }
              }
          }
      ---------- END SOURCE ----------

      FREQUENCY : occasionally


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            Reporter:
            webbuggrp Webbug Group
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              Created:
              Updated: