#!/usr/bin/perl

my $foo = 1;
my $bar = $foo - 1;

$SIG{__DIE__} = \&report;
eval {
    print + ( $foo / $bar ),"\n";
};

sub report {
    (my $num) = shift() =~ /at \S+ line (\d+)/;
    warn "Failure in eval() at line $num:\n";
    seek DATA, 0,0;
    my $c;
    EVAL: while (<DATA>) {
        if ($. == $num) {
            $c += () = /\{/;
            warn $_;
            $c -= () = /\}/;
            last unless $c;
            while (<DATA>) {
                $c += () = /\{/;
                warn $_;
                $c -= () = /\}/;
                last EVAL unless $c;
            }
        }
    };
};

__END__
Failure in eval() at line 8:
    print + ( $foo / $bar ),"\n";
[download]

which is far from perfect (and doesn't claim to be (specially the bracket foo is b0rken)). I'm not sure whether this qualifies as "mucking around with source filters" to your eyes, but I'm inclined to believe it does.

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}