Re: build failure (alpha-current): floating point exception 8

[christos%zoulas.com@localhost (Christos Zoulas)]

On Mar 3,  2:16pm, njoly%pasteur.fr@localhost (Nicolas Joly) wrote:
-- Subject: Re: build failure (alpha-current): floating point exception 8

| On Mon, Mar 02, 2009 at 02:44:23PM +0100, Nicolas Joly wrote:
| > On Mon, Mar 02, 2009 at 12:29:57PM +0000, Christos Zoulas wrote:
| > > In article <20090302110553.GA274304%medusa.sis.pasteur.fr@localhost>,
| > > Nicolas Joly  <njoly%pasteur.fr@localhost> wrote:
| > > >On Sun, Mar 01, 2009 at 11:08:02PM +0000, Christos Zoulas wrote:
| > > >> In article <86sklwyhov.wl%kazumi%mse.biglobe.ne.jp@localhost>,
| > > >> FURUSAWA Kazumi  <kazumi%mse.biglobe.ne.jp@localhost> wrote:
| > > >> >Hi, all,
| > > >> >
| 
| > The last one, seems to comes from strtod returning NaN which is the
| > compared to a huge number ...
| > 
| > njoly@thanos [~/tmp]> gdb /local/src/NetBSD/tool/bin/nbawk 
| > GNU gdb 6.5
| > [...]
| > This GDB was configured as "alpha--netbsd"...
| > (gdb) run '$NF!~/^rump/' 1.out
| > Starting program: /local/src/NetBSD/tool/bin/nbawk '$NF!~/^rump/' 1.out
| > [...]
| > Program received signal SIGFPE, Arithmetic exception.
| > 0x0000000120011004 in is_number (s=0x160308024 "nanotime")
| >     at /local/src/NetBSD/src/dist/nawk/lib.c:713
| > 713             if (ep == s || r == HUGE_VAL || errno == ERANGE)
| 
| To be sure, i removed the `r == HUGE_VAL' and the build succeeded.
| 
| If i understand correctly, HUGE_VAL is used to check for for infinity
| (wonder if INFINITY should be used instead ?). But nothing check for
| NaN ...
| 
| While here i noted that strtod(3) man page state that `NAN' sequence
| string are not supported, which does not looks correct anymore:
| 
|      -   one of NAN or NAN(n-char-sequence-opt), ignoring case. This
|          implementation currently does not interpret such a sequence.

I think one should use isinf() or isnan(), since there is +/- inf and many
nans.

christos