>From the log, looks like this hit a bug in debconf. Same issue appears
to crop up for other packages (e.g. LP: #1914964).
Setting up libpam-sss:amd64 (2.3.1-3ubuntu3) ...
Use of uninitialized value $ret in string eq at
/usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 134.
The code in question is:
sub capb
{
my $this=shift;
my $ret;
return $this->{capb} if exists $this->{capb};
($ret, $this->{capb}) = $this->talk('CAPB');
return $this->{capb} if $ret eq '0';
}
So apparently whatever $this->talk('CAPB') resolves to returned an
undefined value for $ret. A paper-over fix might be something like:
return $this->{capb} if defined $ret and $ret eq '0';
However, would be better to know what triggers the error condition since
there could be a deeper problem involved.
Anyway, thanks for reporting this defect in Ubuntu, hopefully there's
enough info for the debconf maintainers to take it from here.
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https://bugs.launchpad.net/bugs/1914875
Title:
Use of uninitialized value $ret in string eq at
/usr/share/perl5/Debconf/FrontEnd/Passthrough.pm line 134.
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