Another option would be to replace the DIE handler for the execcution of the step that throws the error:
$SIG{__DIE__}=sub(
my $d=shift;
if($d eq 'error to really die on'){
print $d;
exit;
}elsif($d eq 'some other die to handle specially'){
# do some special code to recover from this die
}
#just return to code on other dies
);
$_=PDF::Core::PDFGetline ($fd,\$offset);
die "Can't read cross-reference section, according to trailer\n" if !
+/xref\r?\n?/ ;
#resturn to default DIE handler
$sig{__DIE__}='DEFAULT';
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