// Array push - mutating operation
// Expect: decision="fallback", reason="policy_denied_mutating"
// Run:
//   NYASH_JIT_EXEC=1 NYASH_JIT_THRESHOLD=1 NYASH_JIT_EVENTS=1 NYASH_JIT_HOSTCALL=1 \
//     ./target/release/nyash --backend vm examples/jit_hostcall_array_push_mutating.hako

static box Main {
  main() {
    local a, x
    a = new ArrayBox()
    x = "item1"
    
    // Mutating operation - should fallback with policy_denied_mutating
    a.push(x)
    
    return a.length()  // ReadOnly - should allow
  }
}