groff (tbl/troff) gets confused when page number register format is roman, not decimal

[Jonathan Leffler]

Another odd-ball bug - the key operation is the combination of setting 
the current page number to 9 (.pn 9) plus setting the page number 
format to roman (.af % i).  This produces the messages:

tblbug2.n:5: expected `;' after scale-indicator (got `x')
troff: expected `;' after scale-indicator (got `x')

I think the problem is in tbl - but I could be misreading the 
tealeaves.  The complete document that produces this error is:

.pn 9
.af % i
.EH "!%\h'1c'\fIContents\fP!!!"
.OH "!!!\fIContents\fP\h'1c'%"
.TS
center, expand, tab(@);
lb r.
address@hidden
.TE

I was processing using 'groff -t -Tps -mm tblbug2.n > tblbug2.ps'.
I was using groff 1.18.1 on MacOS X 10.3.5, and (as before) I have 
been unable to upgrade to groff 1.19 because it does not compile 
cleanly out of the box with either the GCC 3.4.0 I built or the GCC 
3.3 built by Apple.

If you change the .af line to use '0' instead of 'i', the output is clean.

--
Jonathan Leffler (address@hidden, address@hidden) 
#include <disclaimer.h>
Guardian of DBD::Informix v2003.04 -- http://dbi.perl.org/