CVE-2019-0933: Out-of-bounds write

The vulnerability stems from improper handling of object operations in ChakraCore's JIT optimizer. The commit diffs show critical additions of StSuperFld and related opcodes to memory/array tracking functions (CheckJsArrayKills, ProcessArrayValueKills, ProcessFieldKills). These functions previously lacked proper handling for super field stores, causing the optimizer to make incorrect assumptions about memory layout/array bounds. The explicit addition of these opcode handlers in the patches indicates they were the root cause of the out-of-bounds write vulnerability.