$foo, $bar, and "the $foo" are not tainted. Try appending the following to the script:

print "5. tainted\n" if tainted($bar);
print "6. tainted\n" if tainted("the $foo");

[download]

Neither line prints.

Good Day,
    Dean

In reply to Re^2: "one tainted value taints the whole expression" by duelafn
in thread "one tainted value taints the whole expression" by duelafn

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