I think that at the heart here we have a core vs non-core issue.

Core modules should be upto date with the latest things that have happened

Core modules that cause seg faults tend to get fixed fast where as when a module such as Clone causes one it is not considered such an issue.

perl -e 'use Clone qw(clone); $a = \$b; undef $a; $c = clone $a;'
[download]

and

perl -e 'use Clone qw(clone); $a ={}; undef $a; $c = clone $a;'
[download]

Cause Seg faults

but

perl -e 'use Clone qw(clone); undef $a; $c = clone $a;'
[download]

and

perl -e 'use Clone qw(clone); $a =""; undef $a; $c = clone $a;'
[download]

does not cause this issue.

Core supports Uni-code but it takes time for modules to catch up. It appears that Clone does not support Unicode structures correctly :-

perl -MClone=clone  -le '%a=(chr 256 =>1);$c=clone \%a; print ord fore
+ach keys %$c'
196
[download]

as oposed to

perl -MStorable=dclone  -le '%a=(chr 256 =>1);$c=dclone \%a; print ord
+ foreach keys %$c'
256
[download]

Hope this clears up a few things
UnderMine