[Exist-open] Bug while reading document data

[Wolfgang M. <wol...@gm...>]

Hi,

I just fixed a bug in the collection store, leading to exceptions
while reading document data. The bug is not very likely to occur, but
it nevertheless corrupts the db immediately: by coincidence, a
collection entry in collections.dbx was confused with a document entry
stored in the same btree (both entries started with the same byte
sequence).

Well, you may have hit the bug if you encounter a database corruption
and find exceptions originating from DocumentImpl.read in the log
files.

Wolfgang