[Bug 1471] New: mbrtowc does not set output wchar when converting null char

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=1471

              Host: i386-pc-linux-uclibc
            Target: i386-pc-linux-uclibc
             Build: i386-pc-linux-uclibc
           Summary: mbrtowc does not set output wchar when converting null
                    char
           Product: uClibc
           Version: 0.9.30.3
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Locales
        AssignedTo: unassigned at uclibc.org
        ReportedBy: michael at talamasca.ocis.net
                CC: uclibc-cvs at uclibc.org
   Estimated Hours: 0.0


Created an attachment (id=1441)
 --> (https://bugs.busybox.net/attachment.cgi?id=1441)
Test for broken mbrtowc

The standards require mbrtowc to store an output value in the provided wchar_t
pointer in all non-error conditions.  But uClibc does not do this when
converting the terminating zero of a string, instead leaving whatever garbage
was previously there alone.

This causes GNU tar 1.23 to assertion-fail in some cases.

A simple demonstration is attached.


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