#include <mach/mig_strncpy_zerofill_support.h> not included by <mach/mach.h> — include it explicitly
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mach/mig_strncpy_zerofill_support.h

This dummy header file is created for mig to check when to call mig_strncpy_zerofill.

This header declares nothing itself under the arm64 configuration; it groups the headers below.