This is TeX, Version 3.14159 (Web2C 7.3.7)
(./listing.tex
LaTeX2e <2001/06/01>
Babel <v3.7h> and hyphenation patterns for american, french, german, ngerman, n
ohyphenation, loaded.
(/usr/share/texmf/tex/latex/base/article.cls
Document Class: article 2001/04/21 v1.4e Standard LaTeX document class
(/usr/share/texmf/tex/latex/base/size12.clo))
(/usr/share/texmf/tex/generic/babel/babel.sty
(/usr/share/texmf/tex/generic/babel/germanb.ldf
(/usr/share/texmf/tex/generic/babel/babel.def)))
(/usr/share/texmf/tex/latex/listings/listings.sty
(/usr/share/texmf/tex/latex/graphics/keyval.sty)
(/usr/share/texmf/tex/latex/listings/lstpatch.sty)
(/usr/share/texmf/tex/latex/listings/lstmisc.sty)
(/usr/share/texmf/tex/latex/listings/listings.cfg)) (./listing.aux) [1]
(./listing.toc) [2] (/usr/share/texmf/tex/latex/listings/lstlang1.sty)
(/usr/share/texmf/tex/latex/listings/lstmisc.sty)

! Package keyval Error: numbers undefined.

See the keyval package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.32 numbersep=5pt, showstringspaces=false}
                                           
? 
! Package keyval Error: numberstyle undefined.

See the keyval package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.32 numbersep=5pt, showstringspaces=false}
                                           
? 
! Emergency stop.
 ...                                              
                                                  
l.32 numbersep=5pt, showstringspaces=false}
                                           
Output written on listing.dvi (2 pages, 492 bytes).
Transcript written on listing.log.