"I" BTrees on 64-bit boxes can lose bits

[Tim Peters]

See

    <http://mail.zope.org/pipermail/zodb-dev/2004-November/008200.html>

for the long course. Short course: IO, II, and OI BTree-based data structures intend that the integers fit in no more than 32 bits, but don't detect violations on boxes with sizeof(long) > sizeof(int) (most likely 64-bit non-Windows C compilers). Instead bits from ints can be lost, via implicit downcasting (from long to int) in the C code.

[Andreas Jung (ajung)]

Is this still an issue?

[Tim Peters (tim-one)]

Yes, it's still an issue.

[Tim Peters (tim-one)]

Unassigned myself -- I haven't done ZODB work in nearly 3 years :-(

[Hanno Schlichting (hannosch)]

Fix released in 3.10.0b2