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The POSIX standard [IEEE Std 1003.1:2013] adds SIGBUS to the list of computational exception signal handlers,

The behavior of a process is undefined after it ignores a SIGFPE, SIGILL, SIGSEGV, or SIGBUS signal that was not generated by kill(), sigqueue(), or raise().

Do not return from SIGFPE , SIGILL, or SIGSEGV, or any other implementation-defined value corresponding to a computational exception such as SIGBUS on POSIX systems, regardless of how the signal was generated.

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