[ 1496624 ] bug manifested in internal function commands

[Daniel J S. <dan...@ie...>]

I wrote up a bug report on a bad pointer which manifests itself as stuff like this:

Terminal type set to 'x11'
gnuplot> f(x) = x+a
gnuplot> g(x) = x+b
gnuplot> plot f(x)
         undefined variable: a
gnuplot> reset
gnuplot> plot f(x)
         undefined variable: 4

The 4 is just some random gibberish and will sometimes crash.

I'd rather someone else fix this one because the solution will be quite involved, but I've described in detail in the bug report exactly where/why it is crashing.

Dan