39 strokes 

sub invert{
    #23456789012345678901234567890123456789
    $_=pack'C*',1..255;eval"tr/$_[0]//d";$_
}
print invert('just Another Edge Case Waiting to Crash!');

[download]

Update

Updated invert text as per below :-)

cheers

tachyon

In reply to Re: Golf: string complement by tachyon
in thread Golf: string complement by japhy

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