This was doing ref(foo), where foo is an Array. This will
create a temporary Variant, call the ref(CVarRef) overload, which
casts the temporary to a non-const RefResult, then a temporary
VRefParam is implicitly constructed from this, which creates a
KindOfRef and points the temporary variant at that. The sort will
operate on this temporary (leading to copy on write, and storing the
new ArrayData* there), so the m_constants field won't reflect the
changes.
Sean Cannella