1. A computer hardware system of modifying error handling operations for checking of an array access in program code during compilation thereof, the system comprising: an intervener mechanism configured to locate a sequentially arranged null checking operation and array bounds checking operation for the array access; a null check modification mechanism configured to remove the located sequentially arranged null checking operation; and an array bounds check mechanism configured to modify the corresponding error handling operation to incorporate the removed null checking operation for the located sequentially arranged array bounds checking operation to perform functions of the removed null checking operation during execution of the program code if the bounds checking operation fails prior to setting an array bounds error.