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invalid gnuplot_binary should fail gracefully

From: Dmitri A. Sergatskov
Subject: invalid gnuplot_binary should fail gracefully
Date: Thu, 6 Aug 2015 12:17:31 -0500

But it does not:

octave:1> graphics_toolkit gnuplot
octave:2> gnuplot_binary ("somejunk")
octave:3> plot(1:3)
sh: somejunk: command not found
error: popen2: popen2 (child): unable to start process -- No such file or directory
error: called from
    __gnuplot_open_stream__ at line 30 column 40
    __gnuplot_drawnow__ at line 72 column 19
error: 'unset' undefined near line 1 column 1
warning: broken pipe

At this moment I  can kill octave only with kill -9. Ctrl-C gets ignored.


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