gawk 3.1.4: regexp matching broken in multibyte locales

[Andreas Schwab]

The following command prints nothing:

$ printf "ab\n\tb\n" | LC_ALL=de_DE.UTF-8 awk '/^[ \t]/ { print }'

The problem is that dfaexec caches the pointer to the buffer and skips the
multibyte setup if called again with a pointer into the same buffer, which
is of course bogus, since it's the _contents_ that matter.

Andreas.

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Andreas Schwab, SuSE Labs, address@hidden
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