It may well be, since
print $s . $s . $s; # still produces the "error",
print '' . $s . $s . $s; # makes it go away,
# But!
print join '', $s, $s, $s; # is fine,
The latter should still be essentially a concatenation in which the first element of the list is the tied variable. So what we're observing should result from an interaction between the tie mechanism and the concatenation operator.
BTW: it is well known that when a bare variable is passed as the first argument of a join, it is re-evaluated every time it's needed, and
print join $s, ('') x 4;
gives me (with the code of Re^2: tie() weirdness)
FETCH called!
FETCH called!
FETCH called!
FETCH called!
123
which is unexpected too, but can be understood in terms of an extra-evaluation.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.