I've figured out that the destructor mangles $@
Right. eval {} does two things: first, it catches exceptions and places them in $@, and second (and often overlooked) it clears $@ if there were no exceptions. So the do_something method was setting $@ and bailing out of the main eval {}, but as part of that bail out, $page was destroyed, and the destructor's eval {} was clearing the just-set $@.

In reply to Re: croak() does not "die" when DESTROY is used by ysth
in thread croak() does not "die" when DESTROY is used by telcontar

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