s s s 
six, 
  
s s 
slaves, 

s 
slaves join abe, 

chop, chop, 
chop, chop 

sexmix, 

s 
label leg,

s up? 

uevaluesex

[download]

Yes, this bizarre thing actually compiles and runs, and is arguably useful.

Replies are listed 'Best First'.
Re: Revisionism, Perl-Style
by spaz (Pilgrim) on Feb 03, 2001 at 01:12 UTC
    I have no idea what this does (it doesn't do anything on my system) but for those interested, here's what it comes out as. 
    s/ / \n/xi, s/ \n/lave/, s/lave/join 'abe', chop $_, 
chop $_, chop $_, chop $_;/eimx, s/abe/();/eg, 
s/p? \n\n/eval $_;/exes;

    [download]
[reply]
[d/l]
      Close, but no cigar :P

      Remember, newlines within substitutions/matches that are modified by /x are ignored. Take out your '\n's and the de-obfuscated code "does the right thing", namely the last substitution finds a match, evaluates the substitution expression, which is an eval instruction which in turn evaluates the string "eval", contained by that time in $_, which leads to endless recursion. 

         MeowChow                                               
                print $/='"',(`$^X\144oc $^X\146aq1`)[-2]
[reply]
[d/l]
        Looks like spaz has uncovered a bug in B::Deparse. 
        % perl -le 'print "a" =~ /a' -e '/x'
1
% perl -MO=Deparse -le 'print "a" =~ /a' -e '/x'
-e syntax OK
 
print 'a' =~ /a\n/x;

% perl -le 'print "a" =~ /a\n/x'

%

        [download]
        Oops!

        (I'm taking advantage of the implicit newline for -e.)

[reply]
[d/l]

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