Explain the bug in circular_left_shift() method and how to fix it:

aTest public void testCircularLeftShift() { int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9}; // set a breakpoint on the line below to debug lab01.circular_left_shift(a); assertArrayEquals(new int[]{2, 3, 4, 5, 6, 7, 8, 9, 1}, a) // This method performs a circular left shift of elements // stored in a. Specifically, the first element is shifted Il to the last position, and all other elements are shifted // to the left by one position. The shifted array is returned. public void circular_left_shift(int[] a) { int i; for(i=0; i