Here's a blast from the past. You're right, the description is very straight forward. It just doesn't work.
At least, on the version of perl I was using at the time, and given the near absence of documentation of the 'feature', try as hard as I could, I could see no way of utilising it.
And, noone ever came forward with any sugggestion of how I can use $^M to allow my Perl program to obtain control once the system refuses the process further memory allocation so that I might at least be able to clean up; close filehandles, put out a "Sorry!" message, prevent the system generating a core dump. You know, that sort of practical step that $^M promises to allow.
Hmm. What do you call a feature that cannot be used?
Examine what is said, not who speaks.
Silence betokens consent.
Love the truth but pardon error.
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