Bug with UTF-8 character

good morning,

I got a bug request for the following unicode character in PostgreSQL
8.1.4: 0xedaeb8

ERROR: invalid byte sequence for encoding "UTF8": 0xedaeb8

This one seemed to work properly in PostgreSQL 8.0.3.

I think the following code in postgreSQL 814 has a bug in it.

File: postgresql-8.1.4/src/backend/utils/mb/wchar.c

The entry values to the function are:

source = ed ae b8 20 20 20 20 20 20 20 20 20 20 20 20

length = 3 (length is the length of current utf-8 character)

But the code does a check where the second character should not be
greater than 0x9F, when first character is 0xED. This is not according
to UTF-8 standard in RFC 3629. I believe that is not a valid test.

This test fails on our string, when it shouldn’t.

I believe this is a bug, could you please confirm or let me know what I
am doing wrong.

Many thanks,

Hans

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