https://bz.apache.org/SpamAssassin/show_bug.cgi?id=8003

--- Comment #8 from Sidney Markowitz <sid...@sidney.com> ---
(In reply to Loren Wilton from comment #7)
> restore to the captured value rather than some arbitrary string?

A child process creates a new copy of the environment containing whatever is
passed down to it by the parent process. Any change it makes to an environment
variable is only seen by that child process and by any children it spawns after
it has made the change. There is nothing that has to be explicitly restored
when the child process exits.

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