[Bug c/47090] New: Incorrect parsing by ssanf/fscanf with scanset.

[gavenkoa at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47090

           Summary: Incorrect parsing by ssanf/fscanf with scanset.
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: gaven...@gmail.com


This happen with gcc (GCC) 4.3.4 20090804 (release) 1 from Cygwin
and gcc (GCC) 4:4.3.2-2 from Debian.

  $ cat 1.c
#include <stdio.h>

int main()
{
    char str[30] = "===============";
    char ch = '!';

    int cnt = sscanf("hello\n", "%5s%1[\n]", str, &ch);

    printf("xxx%sxxx\n%d\nyyy%czzz", str, cnt, ch);

    return 0;
}

  $ gcc 1.c -o 1.exe && ./1.exe
xxxxxx        # I expect get xxxhelloxxx
2
yyy
zzz

  $ sed -i 's=%5s=%10s=' 1.c

  $ gcc 1.c -o 1.exe && ./1.exe
xxxxxx        # I expect get xxxhelloxxx
2
yyy
zzz

  $ sed -i 's=%10s=%4s=' 1.c
xxxhellxxx    # Seems all OK
1
yyy!zzz