[GitHub] [uima-uimaj] reckart opened a new issue, #304: Unable to deserialize CAS if last element on the heap is an empty array

["reckart (via GitHub)" <gi...@apache.org>]

reckart opened a new issue, #304:
URL: https://github.com/apache/uima-uimaj/issues/304

   **Describe the bug**
   There is a very rare bug in deserializing a CAS when the last element on the heap is an empty array and the heap and there is no additional space on the heap after that element.
   
   **To Reproduce**
   TBH, I have no idea how to really reproduce this. But here is what happens:
   
   **BinaryCasSerDes.java**
   ```
        heapIndex=254
        heap.heap.length=256
   ----
         if (type.isArray()) {
           final int len = heap.heap[heapIndex + arrayLengthFeatOffset]; // We get the length of the array -> 0
           final int bhi = heap.heap[heapIndex + arrayContentOffset]; // We get the pointer(?) to the start of the array 254+2 -> CRASH
   ```
   
   The code crashes with an `IndexOutOfBoundsException` because `heapIndex + arrayContentOffset >= heap.heap.length`. However, we do not really need `bhi` because the array is empty and thus we won't read its contents anyway.
   
   **Expected behavior**
   If the array is empty, skip `bhi` and related core entirely.
   
   **Please complete the following information:**
    - Version: 3.4.0
   


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[GitHub] [uima-uimaj] reckart closed issue #304: Unable to deserialize CAS if last element on the heap is an empty array

["reckart (via GitHub)" <gi...@apache.org>]

reckart closed issue #304: Unable to deserialize CAS if last element on the heap is an empty array
URL: https://github.com/apache/uima-uimaj/issues/304


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