[antlr-interest] Strange bug in ANTLR version higher than 3.1.2

[FranklinChen at cmu.edu]

> > So I think the right thing for me to do is to study the generated code
> > for rewrites and mimic the use of the adaptor APIs to link up the
> > trees correctly.
> 
> Yes - this is what I was getting at basically.
> 
> Jim

It turned out that it was not useful studying the generated code.
However, I ended up solving my problems by using
adaptor.addChild(parent, adaptor.dupTree(child)) whenever splicing a
tree created earlier in a parse into a new parent.  This is probably
overkill, with a lot of extra copying of subtrees, but it seemed
cleanest and guaranteed to work correctly.

-- 
Franklin