> You're going to ask for a small failing test case; unfortunately there isn't
one :-(

Just send the smallest one you can construct. Even if it appears complex,
debugging something you can actually run is vastly easier than debugging
something you can't.

And remember: if you can't find the bug, that's usually because you're looking
in the wrong place, and by only sending us part of the code, you might well be
sending us only the part where the bug isn't.

Michael Kay
Saxonica