Patch from https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=179721 broke some application (xterm, pidign)

[Pedro Giffuni]

Hello Vitalij;

> Hello.
>
> After updating my system to 11.0-ALPHA2 #20 r301583
> I'm found that at last some application is broken.
>
> here backtrace for xterm
>
> #0  0x00000008022d48b4 in mbsrtowcs_l () from /lib/libc.so.7
> [New Thread 804816000 (LWP 102346/<unknown>)]
> (gdb) bt
> #0  0x00000008022d48b4 in mbsrtowcs_l () from /lib/libc.so.7
> #1  0x00000008022d1b4f in strcoll_l () from /lib/libc.so.7
> #2  0x00000008022d0ddf in __collate_range_cmp () from /lib/libc.so.7
> #3  0x00000008022cf6ce in vfscanf () from /lib/libc.so.7
> #4  0x00000008022b0114 in vsscanf () from /lib/libc.so.7
> #5  0x00000008022aee6d in sscanf () from /lib/libc.so.7
> #6  0x00000000004523a3 in ?? ()
> #7  0x0000000000430edd in ?? ()
>
> for pidgin it's look same.
>
> It seems that patch not fully care about all cases where function like __collate_range_cmp used.
>
> Manualy rollback changes from http://svnweb.freebsd.org/base?view=revision&revision=301461  fix the problem for now.


Thank you very much for the report.
I am testing the fix (replacing __collate_range_cmp in vfscanf()),
right now.

Pedro.