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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Start the Erlang shell from the command line. Type</span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=IT style='font-size:10.0pt;
font-family:Arial'>Io:format(“~p~n”,[lists:seq(1,8000)]).</span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=IT style='font-size:10.0pt;
font-family:Arial'> </span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>The shell hangs. It’s not consuming CPU, just
hanging.</span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>This behaviour depends on the shell state. Start the
shell and type the TWO commands</span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=IT style='font-size:10.0pt;
font-family:Arial'>Io:format(“~p~n”,[lists:seq(1,7000)]).</span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=IT style='font-size:10.0pt;
font-family:Arial'>Io:format(“~p~n”,[lists:seq(1,8000)]).</span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=IT style='font-size:10.0pt;
font-family:Arial'> </span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>and BOTH commands work. That’s why it’s
important to run the first command in a freshly started shell, to reproduce the
bug.</span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Perhaps something to do with dynamically expanding
the process heap?</span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>I’m using a fresh download of R11B-3 under
Windows XP, but the bug has been there at least since version 5.4.12 of the
shell.</span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'> </span></font></p>

<p class=MsoAutoSig><i><font size=4 color=red face="Times New Roman"><span
style='font-size:14.0pt;color:red;font-style:italic'>John</span></font></i></p>

<p class=MsoNormal><i><font size=4 color=red face="Times New Roman"><span
style='font-size:14.0pt;color:red;font-style:italic'> </span></font></i></p>

<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>

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