[Octave-bug-tracker] [bug #38166] crash when printing with no output file (i.e. spooling via lpr)

[Rik]

Follow-up Comment #8, bug #38166 (project octave):

Ben, I just tried your patch and I still get a segfault on a linux system with
gnuplot toolkit.


octave:5> print -deps
warning: print.m: fig2dev binary is not available.
Some output formats are not available.
terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::substr
Abort


After some debugging, it appears to be because we call eps_drawnow with a
filename of "" from within __gnuplot_drawnow__.m.  I added a line to set it in
the ".eps" branch of the case statement and it doesn't crash anymore.  But,
this isn't my area so you should probably take a look at it.  (See attached
eps.crash.patch)  In particular, the code doesn't send anything to the
printer, but maybe that is right.

Test code


graphics_toolkit gnuplot;
plot (1:10);
print -deps



Note, that it is still possible to get Octave to segfault by using one of the
other branches of the case statement such as


print -dsvg


This suggests that we should really move the test for a null opts.name above
the case statement so it can apply to everyone.


(file #29009)
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Additional Item Attachment:

File name: eps.crash.patch                Size:1 KB


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