If POSIX can be loaded, then _exit is used on exec failure.

    exec @cmd or do {
        carp "$Me: exec of @cmd failed";
        eval { require POSIX; POSIX::_exit(255); };
        exit 255;
    };
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Using _exit should avoid the problem because _exit doesn't allow destructors to be run.

>perl -MPOSIX -le"DESTROY{print q{foo}}$o=bless{};$ARGV[0]?_exit 1:exi
+t 1" 1

>perl -MPOSIX -le"DESTROY{print q{foo}}$o=bless{};$ARGV[0]?_exit 1:exi
+t 1" 0
foo
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Could there be a problem loading POSIX?