Bug#665432: gnuplot: using stdin makes gnuplot crash

[Agustin Martin]

On Mon, Mar 26, 2012 at 11:11:47PM +0200, Vincent Lefevre wrote:
> Something more complex, as
> 
>   echo | gnuplot -
> 
> does not crash.
> 
> FYI,
> 
> $ echo "foo" | valgrind gnuplot -
> ==11357== Memcheck, a memory error detector
...
> A null pointer dereference?

> So, there seems to be a problem with com_line() while interactive
> is TRUE (and I wonder what the intent is...).

Just for the records,

I have been trying to track this "the dumb way" (putting messages here and
there) and seems that the problem is in a call to gp_get_string called
from read_line called from com_line (all in command.c).

I had no time to go further and do not know when I will have it. I am
attaching a diff with a minimal fprintf set around the problem.

Hope this helps,

-- 
Agustin
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