[Bug stdio/28828] New: fputwc crashes

[jobol at nonadev dot net]

https://sourceware.org/bugzilla/show_bug.cgi?id=28828

            Bug ID: 28828
           Summary: fputwc crashes
           Product: glibc
           Version: 2.33
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: stdio
          Assignee: unassigned at sourceware dot org
          Reporter: jobol at nonadev dot net
  Target Milestone: ---

Created attachment 13933
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13933&action=edit
short program

on amd64, debian.

the program b.c attached (and listed below). Crashes with SIGSEGV in the first
fputwc.

It does not crashes if I comment the line 8.


 1: #include <stdio.h>
 2: #include <wchar.h>
 3: int main(int ac, char **av)
 4: {
 5:         wint_t c;
 6: 
 7:         setvbuf(stdin, NULL, _IOLBF, 0);
 8:         setvbuf(stdout, NULL, _IOLBF, 0);
 9:         c = fgetwc(stdin);
10:         fputwc(c, stdout);
11:         fputwc(10, stdout);
12:         return 0;
13: }

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