[Bug optimization/13609] sscanf optimization error

["pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-01-07 22:25 -------
Not a bug %[a-z] expects a char array and you are only supplying it with enough room for zero 
characters.

>From the man of printf:
       [      Matches a nonempty sequence of characters from the specified set of accepted 
characters; the next pointer must be  a  pointer
              to  char,  and  there  must be enough room for all the characters in the string, plus a 
terminating NUL character.  The usual
              skip of leading white space is suppressed.  The string is to be made up of characters in 
(or not in) a  particular  set;  the
              set  is  defined  by  the  characters between the open bracket [ character and a close 
bracket ] character.  The set excludes
              those characters if the first character after the open bracket is a circumflex ^.  To include 
a close  bracket  in  the  set,
              make  it the first character after the open bracket or the circumflex; any other position 
will end the set.  The hyphen char-
              acter - is also special; when placed between two other characters, it adds all intervening 
characters to the set.  To include
              a  hyphen,  make  it  the  last character before the final close bracket.  For instance, 
`[^]0-9-]' means the set `everything
              except close bracket, zero through nine, and hyphen'.  The string ends with the 
appearance of a character  not  in  the  (or,
              with a circumflex, in) set or when the field width runs out.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13609