[Bug 252727] readelf returns 0 (success) even on error

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252727

            Bug ID: 252727
           Summary: readelf returns 0 (success) even on error
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs at FreeBSD.org
          Reporter: emaste at freebsd.org

$ readelf -l /dev/null;  echo $?
readelf: elf_begin() failed: Invalid argument
0

This prevents error handling in shell scripts.

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