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=head1 NAME
Lucy::Object::Err - Exception.
=head1 SYNOPSIS
use Scalar::Util qw( blessed );
my $bg_merger;
while (1) {
$bg_merger = eval {
Lucy::Index::BackgroundMerger->new( index => $index );
};
last if $bg_merger;
if ( blessed($@) and $@->isa("Lucy::Store::LockErr") ) {
warn "Retrying...\n";
}
else {
# Re-throw.
die "Failed to open BackgroundMerger: $@";
}
}
=head1 DESCRIPTION
Most of the time when Lucy encounters an error, it tries to raise a
Lucy::Object::Err exception with an error message and context
information.
At present, it is only safe to catch exceptions which are specifically
documented as catchable; most times when an Err is raised, Lucy leaks
memory.
The Err module also provides access to a per-thread Err shared variable via
set_error() and get_error(). It may be used to store an Err object
temporarily, so that calling code may choose how to handle a particular
error condition.
=head1 INHERITANCE
Lucy::Object::Err isa L<Lucy::Object::Obj>.
=cut
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