I test my change and get an error:

ClearCase-Argv> perl -Iblib/lib -Iblib/arch -e 'use ClearCase::Argv;su
+b p{$a=shift;print"--${a}--\n";system(qw(pgrep cleartool))}sub v{$c=s
+hift;$c->argv(q(pwv))->system}ClearCase::Argv->ipc(1);p(1);$c1=ClearC
+ase::Argv->new;p(2);$c2=ClearCase::Argv->new;v($c1);p(3);$c1->clone->
+argv(q(pwv));p(4);v($c1);p(5);v($c1);'
--1--
22003
--2--
22003
Working directory view: emagiro
Set view: emagiro
--3--
22003
Attempt to bless into a reference at blib/lib/ClearCase/Argv.pm line 6
+37, <GEN1> line 3.
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This is the line:

    bless $self, $proto;
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I assume it is wrong to bless the reference I got in the case this was used as a copy constructor.
So, I must test it?

    bless $self, ref($proto) ? ref($proto) : $proto;
[download]

This makes my test happy...

Marc