Comment 3 for bug 651509

FWIW, perl's environment handling seems to be somewhat controversial. Possibly related:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=142523, for which the upstream report is here: http://rt.perl.org/rt3/Public/Bug/Display.html?id=1170

Also mod_perl has some interesting commentary:
     /* Force the environment to be copied out of its original location
        above argv[]. This fixes a crash caused when a module called putenv()
        before any Perl modified the environment - environ would change to a
        new value, and the check in my_setenv() to duplicate the environment
        would fail, and then setting some environment value which had a previous
        value would cause perl to try to free() something from the original env.
        This crashed free(). */
     my_setenv("MODPERL_ENV_FIXUP", "0");
     my_setenv("MODPERL_ENV_FIXUP", NULL);

CC'ing perl maintainer for possible comments.