src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/util/IntList.java

*** 29,38 ****
--- 29,40 ----
   *
   * This class avoids the boxing/unboxing incurred by {@code ArrayList<Integer>}.
   */
  public final class IntList {
  
+     private static final int[] EMPTY_INT_ARRAY = new int[0];
+ 
      private int[] array;
      private int size;
  
      /**
       * Creates an int list with a specified initial capacity.
*** 78,91 ****
--- 80,97 ----
       *            {@code length})
       * @return a new int list whose {@linkplain #size() size} is {@code length}
       */
      public static IntList copy(IntList other, int startIndex, int length, int initialCapacity) {
          assert initialCapacity >= length : "initialCapacity < length";
+         if (initialCapacity == 0) {
+             return new IntList(EMPTY_INT_ARRAY, 0);
+         } else {
              int[] array = new int[initialCapacity];
              System.arraycopy(other.array, startIndex, array, 0, length);
              return new IntList(array, length);
          }
+     }
  
      public int size() {
          return size;
      }