Save the state of the %INC before the loop, and restore it at the beginning of each iteration.

Something as simple as this might work, assuming %INC isn't a tied hash:

%INC = %old_INC;

[download]
Or alternatively: 
for (keys %INC) {
    delete $INC{$_} if ! $old_INC{$_};
}

[download]

In reply to Re^3: Changing Module Tree by wind
in thread Changing Module Tree by lackita

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