Adding a DatabaseCondition object to two queries fails

Saving the placeholder object like that creates a circular reference, which results in a memory leak. That's a no-go.

If all we need to do is see if the placeholder object is different than the last time compile was called, you can get a non-reference object ID out of http://us2.php.net/spl_object_hash

Let's use a different variable name to make it clear that it's just the hash ID, not the actual object. :-)

(Because I haven't given Dmitri enough grief about comments and variable names yet tonight...)

All of the failing tests here involve subqueries, although I cannot for the life of me figure out why. I see no reason why it should be dying, since each sub-condition is compiled separately and has its own changed tracker. Dmitri, any ideas?

There are no steps to reproduce the bug here, nor a use-case, so this is as best a normal bug report, if not a task.

fix typo in tag

This is so old and there is no why to reproduce the bug. I am closing this as outdated.