[bug #13600] faulty output of +Infinity from format

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?func=detailitem&item_id=13600>

                 Summary: faulty output of +Infinity from format
                 Project: Guile
            Submitted by: None
            Submitted on: Fri 07/01/2005 at 16:52
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open

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Details:

It appears that the format function produces seemingly incorrect output for
+Infinity in fixed and exponential output format; it outputs "0.\0" (i.e.,
(string #\0 #\. #\nul)) for a positive infinity created by evaluating (/ 1.0
0.0).  I'm not clear what
the right output should be, I guess that's under debate.

I examined the problem on three Linux systems (Opteron, Pentium III, Pentium
4) and guile versions 1.6.4 and 1.6.7.  One of those was a Red Hat package,
the others Debian.  I believe this behavior occurs in both the ice-9 and slib
versions.

The following illustrates the problem:

guile> (version)
"1.6.7"
guile> (use-modules (ice-9 format))
guile> (/ 1.0 0.0)
+#.#
guile> (format #t "~s~%" (/ 1.0 0.0))
+#.#
#t
guile> (format #t "~F~%" (/ 1.0 0.0))
0.^@
#t







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