$ cat strtod_test.c
#include <stdio.h>
#include <stdlib.h>
#include <fenv.h>
int
main ()
{
/* The following number comes from /usr/share/asymptote/ode.asy. */
const char *str = "121645100408832000.0";
char *ptr;
feenableexcept (FE_INVALID);
strtod (str, &ptr);
/* If there was an exception, the following will not get executed. */
printf ("No exception.\n");
}
$ gcc strtod_test.c
$ ./a
Floating point exception (core dumped)
[The above was on x86. On x86_64 there's simply no output.]
I have no idea what's special about the number 121645100408832000.0, but
the problem goes away if, for example, I replace the leading 1 by 2.
Ken
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