BUG REPORT: glibc 2.2 mbrtowc() fails to decode final byte

[Ulrich Drepper]

Markus Kuhn <Markus.Kuhn@cl.cam.ac.uk> writes:

> The following regression test fails in glibc 2.2 under linux-i386:

As Andreas said, this code doesn't fail anymore.  But furthermore it's
incorrect:

>   assert(mbrtowc(NULL, NULL, 0, &s) == 0);   /* get s into initial state */

This is not how initializing a mbstate_t object can work.  Since the
mbrtowc() function can read the mbstate_t object it will read
uninitialized memory.  One has to use memset().

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