Floating point exception on 0.15.13, alpha NetBSD 1.6.1

[Paul Ackersviller]

In case it matters, my bogofilter was built with db-4.2.52 and the
builtin gsl (not using the --with-included-gsl flag, but the system
doesn't have one anyway).  Suggestions anyone?

Here's a post-mortem:

This GDB was configured as "alpha-unknown-netbsd"...
Core was generated by `bogofilter'.
Program terminated with signal 8, Floating point exception.
Reading symbols from /usr/libexec/ld.elf_so...done.
Loaded symbols for /usr/libexec/ld.elf_so
Reading symbols from /arpa/ns/p/pda/NetBSD/lib/libdb-4.2.so...done.
Loaded symbols for /arpa/ns/p/pda/NetBSD/lib/libdb-4.2.so
Reading symbols from /usr/lib/libm.so.0...done.
Loaded symbols for /usr/lib/libm.so.0
Reading symbols from /usr/lib/libc.so.12...done.
Loaded symbols for /usr/lib/libc.so.12
#0  gamma_inc_D (a=118, x=0.086666469256238957, result=0x1fffff278)
    at ../gsl/specfunc/gamma_inc.c:63
63          result->val  = term1/gstar.val;
(gdb) p term1
$3 = 0
(gdb) p gstar
$2 = {val = 1.0007064624257713, err = 4.4440294219051216e-16}
(gdb) p *result
$1 = {val = 1, err = 0}
(gdb) bt
#0  gamma_inc_D (a=118, x=0.086666469256238957, result=0x1fffff278)
    at ../gsl/specfunc/gamma_inc.c:63
#1  0x12001dcd0 in gamma_inc_P_series (a=118, x=0.086666469256238957, 
    result=0x1fffff2a8) at ../gsl/specfunc/gamma_inc.c:81
#2  0x12001ed7c in gsl_sf_gamma_inc_Q_e (a=741.41586624719116, 
    x=0.086666469256238957, result=0x1fffff2d8)
    at ../gsl/specfunc/gamma_inc.c:467
#3  0x12001f3f8 in gsl_sf_gamma_inc_Q (a=741.41586624719116, 
    x=0.086666469256238957) at ../gsl/specfunc/gamma_inc.c:661
#4  0x12001a96c in gsl_cdf_gamma_Q (x=741.41586624719116, a=0, b=2)
    at ../gsl/cdf/gamma.c:130
#5  0x12001a8cc in gsl_cdf_chisq_Q (x=741.41586624719116, 
    nu=0.086666469256238957) at ../gsl/cdf/chisq.c:33
#6  0x1200050d0 in fis_get_spamicity (robn=118, P={mant = 0, exp = 0}, Q={
      mant = -NaN(0xffffffffffac5), exp = -1339}) at fisher.c:112
#7  0x120004990 in rob_compute_spamicity (wh=0x12006e680, fp=0x1fffff248)
    at robinson.c:298
#8  0x120002fc8 in bogofilter (argc=0, argv=0x1fffff4c8) at bogofilter.c:112
#9  0x1200032e4 in main (argc=0, argv=0x1fffff4c8) at main.c:55
(gdb)

-- 
Paul Ackersviller