[Bug-gnucap] gnucap 0.31 fourier segfault / convergence failure

[Nuno Miguel Fernandes Sucena Almeida]

Hello,
        i get a segfault with the attached schematic when i comment out
the .fourier and set the C2 value from 100pF to 47pF . see the gdb
log attachment for GDB output
        i also have the gEDA schematic if you need it.
        With the same schematic and and another simpler schematic, if i
comment out the BFR96 Philips model parameter ITF = 2.48030E-001 i get
this:

(...)
vco_tran_42pF.dat exists.  replace? y
very backward time step
convergence failure (itl4)
zero time step
internal error: step control (adt=1e-12,rdt=-7.8125e-13)
time0=2.0466e-07  time1=2.04659e-07  rtime=2.04659e-07

                        ()s
                                        Nuno Sucena Almeida

geda_vco_bfq19_wil.gdb
Description: Text document

geda_vco_bfq19_wil.ckt
Description: Text document