Attention: cross post
Dieter Maurer wrote at 2003-1-24 09:13 +0100:
> We have run in an apparent "BTrees" bug (with the "BTrees" version
> included in Zope 2.5.1).
> We try to insert a value into an "BTrees.OOBTree.OOBTree" instance
> tree[k]= v
> and get an "exceptions.KeyError on 13384379A0pfvqTmtEQ".
> The code comes from Zope's "Transience" implementation.
> The reported key is some session key. We are not yet
> sure, however, whether it is the key we are just trying
> to insert.
> Reading the "News.txt" of ZODB-3.2a1, this bug may not yet
> be known.
> We will install the "BTrees" package from ZODB-3.2a1 and
> see whether the problem disappears.
> I will report back...
It has been a false alarm. Sorry!
The same problem occured with the new BTrees module.
Therefore, I checked the error again and found,
that the problem was not caused by "tree[k] = v"
but by a nearby "del tree[k]" (which, of course, is entitled to raise
When we had analysed the error for the first time, we happened
to look at some slightly outdated source.
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