I had the exact same issue but in a mod_perl enviro. After a few days I found the following in our memoization routines to be the problem: 
return join '', map {
$_->{type} eq 'static' ? 
$_->{body} : 
$self->execute($_)
} @{$self->{BODY}};

[download]
changing it to the following fixes the havoc: 
my @bodies = @{$self->{BODY}};
return join '', map {
$_->{type} eq 'static' ? 
$_->{body} : 
$self->execute($_)
} @bodies;

[download]

dereferencing and iterating over the deref'ed data with maps do untowardly things to item refcounts and the gc reaps its victims when it pleases.

execute is just a nice wrapper for an eval. it touches nothing inappropriately.

hope this helps a fellow weary soul.

In reply to Re^2: Object reference disappearing during global destruction by Anonymous Monk
in thread Object reference disappearing during global destruction by khkramer

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