Bug#755903: Have to invoke gnuplot with two copies of same input file

[Ian Jackson]

Package: gnuplot
Version: 4.6.0-8

$ gnuplot contrib.runes
$ wc -l contrib.ps
595 contrib.ps
$ gnuplot contrib.runes contrib.runes
$ wc -l contrib.ps
765 contrib.ps
$ cat contrib.runes
set terminal epscairo size 5.0, 3.5
set output 'contrib.ps'

set xrange ["1311264120":"1405958544"]
set yrange [0:800]
set xdata time
set timefmt "%s"
set style fill solid 0.5
plot 'contrib.gnuplot' using 1:2 with boxes title 'osstest loc by author date'
$

The output file from the first invocation does not actually contain
the graph data.  I have searched the whole manual for the word
`output' and nothing seems to suggest what I'm doing anything wrong.

I have seen similar effects with other `set terminal' options.  While
I haven't reproduced that systematically, I don't think this is simply
a bug in the epscairo terminal driver.

The file contrib.gnuplot is attached, as are the two .ps files.

Ian.

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