<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jan 19, 2015 at 9:58 AM, Sam Tobin-Hochstadt <span dir="ltr"><<a href="mailto:samth@cs.indiana.edu" target="_blank">samth@cs.indiana.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">hash-table-specific limitation</blockquote></div><br>I thought this was a 'possibly-mutable data structures' limitation.</div></div>