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From: kania@ronzoni.berkeley.edu (Joanna Kania Bartoszynska)
Newsgroups: comp.text.tex
Subject: This can't happen
Summary: who can fix can fix?
Message-ID: <1990Dec7.163059.23891@agate.berkeley.edu>
Date: 7 Dec 90 16:30:59 GMT
Sender: usenet@agate.berkeley.edu (USENET Administrator)
Reply-To: goldstrn@humus.huji.ac.il (Martin Goldstern)
Organization: The Hebrew University of Jerusalem
Lines: 38

What is wrong with the following file? (The >'s are not really in the
file, of course)
The problem was to put a tilde under a symbol. 

> \baselineskip=1.01\baselineskip
>
>\def\name#1{\mathchoice
>{{\mathop{#1}\limits_{\displaystyle\sim}}}%
>{{\smash{\mathop{#1}\limits_{\textstyle\sim}}\vphantom{#1}}}%
>{{\mathop{#1}\limits_{\scriptstyle\sim}}}%
>{{\mathop{#1}\limits_{\scriptscriptstyle\sim}}}%
>}
>
>$x +  y_{\name z} + \name y_{\name z}^t$
>
>$$x +y_{\name z} + \name y_{\name z}^t$$
>
>\bye

When I TeX'ed it, I received this log file: 
>This is Common TeX, Version 2.9 (preloaded format=plain 88.7.25) 7 DEC 1990
> 18:00
>**m 
>(./m.tex
>! This can't happen (mlist3).
>l.13 ... + \name y_{\name z}^t$$
>                                
>I'm broken. Please show this to someone who can fix can fix
>
>No pages of output.

Who can fix can fix ? 

Martin Goldstern
goldstrn@humus.huji.ac.il

(I am posting this from a friend's account.  
Please DO NOT reply to kania@math.berkeley.edu)