gdbm-1.8.0 fatal bug

[Shilad Sen]

Hello,

I think I've located a reproduceable gdbm bug under linux.  It happens when a
specific set of items are inserted into a database from scratch.  I get a
gdbm fatal read error.  From cursory glancing over the source it looks to me
like gdbm is seeking to the end of the file and then getting a short read
while looking for an empty "bucket."

I've attached a tar file with an example program and text file of keys and
value lengths to insert.  Please read the README for specific instructions.

A couple of notes:

1. This ONLY happens on 64 bit builds of this (i.e. -D_FILE_OFFSET_BITS=64).
2. This has been verified on redhat 6.2, 7.1 and 7.2 systems.

Please let me know if this also fails for you,

Shilad