Does a zero-length line with an arrow make sense? Is it a bug?

Question

\documentclass[pstricks,border=12pt]{standalone}
\usepackage{pstricks-add}
\begin{document}
\multido{\i=0+30}{12}{%
\begin{pspicture}(-2,-2)(2,2)
    \pscircle{1}
    \pnode(1;\i){R}
    \psset{arrows=->}
    \psline(R)
    \psline[linecolor=blue](R|0,0)
    \psline[linecolor=red](0,0|R)
    \psset{linecolor=gray,linestyle=dashed,linewidth=0.5\pslinewidth,arrows=-,dash=2pt 2pt}
    \psline(R)(R|0,0)
    \psline(R)(0,0|R)
\end{pspicture}}
\end{document}

Does a zero-length line with an arrow make sense? Is it a bug? I hope it is a bug. If it is not a bug, what is the best way to handle this case using a conditional macro in either TeX or PS level?

Apparently, this feature is also adopted by TikZ.

\documentclass[tikz,border=0pt]{standalone}
\usepackage{tikz}
\begin{document}
    \tikzpicture
        \fill[yellow] (-1,-1) -- (-1,1) -- (1,1) -- (1,-1) -- cycle;
        \draw[->] (0,0)--(0,0);
    \endtikzpicture
\end{document}

Answer 1

A possible workaround ...

\documentclass[pstricks,border=12pt]{standalone}
\usepackage{pst-node,multido}
\makeatletter
\def\psLine{\pst@object{psLine}}% a special Line 
\def\psLine@i{\pst@getarrows{\begin@OpenObj \pst@getcoors[\psLine@ii}}
\def\psLine@ii{%
    \addto@pscode{
      \ifPst@noCurrentPoint\else\pst@cp\fi    % current point?
      4 copy Pyth2 \psk@arrowlength ge 
        { \psline@iii \tx@Line }% arc and lineto type
        { pop pop pop pop } ifelse }%
  \end@OpenObj}
\makeatother

\begin{document}
\multido{\i=0+30}{12}{%
\begin{pspicture}(-2,-2)(2,2)
    \pscircle{1}
    \pnode(1;\i){R}
    \psset{arrows=->}
    \psLine(0,0)(R)% needs always two pairs of coordinate
    \psLine[linecolor=blue](0,0)(R|0,0)
    \psLine[linecolor=red](0,0)(0,0|R)
    \psset{linecolor=gray,linestyle=dashed,linewidth=0.5\pslinewidth,arrows=-,dash=2pt 2pt}
    \psLine(R)(R|0,0)
    \psLine(R)(0,0|R)
\end{pspicture}}
\end{document}