I use the Data::Dump package which is a standard module.
I'm willing to bet you actually use Data::Dumper.
Be warned that calling Data::Dump::dump($variable) will undef $variable!
Well, Dump() (not dump) is meant to be called as a method and takes references to variables, so there is quite a bit wrong with the above line which could explain your troubles.
As a rule though, Data::Dumper doesn't erase data, as you can see below:
perl -MData::Dumper -e '$var = 103; print Dumper(\$var); print "Still holds: $var.\n"'
$VAR1 = \103;
Still holds: 103.
James
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