> If my understanding of (old) C still stands, d is a local variable
> inside the function's body. At line #556 a 'print d' tells:
>
> $1 = {<text variable, no debug info>} 0x901aea38 <d>
That's odd because your previous post said you got 527076.
> > What value does extract_float return?
>
>
> 214 /* Extract a Lisp number as a `double', or signal an error. */
> 215
> 216 double
> 217 extract_float (num)
> 218 Lisp_Object num;
> 219 {
> 220 CHECK_NUMBER_OR_FLOAT (num);
> 221
> 222 if (FLOATP (num))
> 223 return XFLOAT_DATA (num);
> 224 return (double) XINT (num);
> 225 }
>
> Do you mean to type x when gdb has reached line #225? I get for
> example (own input mostly deleted):
>
No. What value does the GDB command `finish' print if starting from
extract_float, or equivalently, what do you get if you type `print d'
after
556 double d = extract_float (arg);
i.e at
561 IN_FLOAT (d = sqrt (d), "sqrt", arg);
>...
> (gdb) n
> Program received signal EXC_BAD_INSTRUCTION, Illegal instruction/
> operand.
> 0x001f2828 in Fsqrt (arg=4216608) at floatfns.c:561
> Breakpoint 6 at 0x1f27e4: file floatfns.c, line 561.
> (gdb) x
> 0x1f27e4 <Fsqrt+48>: 0x3c5f0020
>
>
> It might be worth to find the Elisp file that uses sqrt with the
> argument of 4216608. *I* have no idea how to find that file ... A
> termscript shows this:
Actually Emacs is computing sqrt (527076) at this point (it's to do with the
way Lisp Objects store numbers).
sqrt (527076) = 726
I think in your case sqrt gets called by tty-color-off-gray-diag in
tty-colors.el but it would be best to find out what goes wrong in Fsqrt.
What happens if you start Emacs as a graphical application and evaluate
(sqrt 527076) in the scratch buffer?
--
Nick http://www.inet.net.nz/~nickrob
_______________________________________________
emacs-pretest-bug mailing list
[email protected]
http://lists.gnu.org/mailman/listinfo/emacs-pretest-bug
