This is pdfTeX, Version 3.14159-13d (Web2C 7.3.1) (format=pdflatex 2001.3.27)  10 OCT 2001 10:01
**regular-expresssions]

! Emergency stop.
<*> regular-expresssions]
                         
End of file on the terminal!

 
Here is how much of TeX's memory you used:
 2 strings out of 20593
 31 string characters out of 192055
 46322 words of memory out of 1500001
 3062 multiletter control sequences out of 10000+15000
 3640 words of font info for 14 fonts, out of 400000 for 1000
 26 hyphenation exceptions out of 1000
 0i,0n,0p,1b,6s stack positions out of 1500i,100n,500p,50000b,4000s
!  ==> Fatal error occurred, the output PDF file not finished!