… instances can be created for NULL addresses. Also add FFI::Pointer::NULL constant
…1.3.0RC1 and RC2. The problem here was that when we built a brand new static scope to contain a Thread's backref/lastline values, we were not entirely copying the original scope. Specifically, we were not using the original scope's previousCRefScope, instead allowing the scope to re-determine what cref scope to use. It ended up choosing the wrong one the second time through, resulting in cvars being incorrectly looked up. Modifying Thread proc creation to also copy the original cref scope fixed the issue.
… along with the merge.
array into NULL pointers
…es for zlib
of the memory area
terminating nul byte in one go.
returned by  can be sliced again by 
ascii or utf-8) in one operation.
terminated array of native strings.
…in with Rails 2.2.2
…hat 1.9 feature yet.
Its 10x slower, but works in all situations.
a pointer field