We read properties of the unit, hence it shouldn't be GC'ed as long as we run. Hence, let's just set AddRef unconditionally for the units we create. (cherry picked from commit 49a510eba29c78f4b7dc1c39391314a48eb8833b) (cherry picked from commit 8326f9e378333ae01f686086bb1fd4d300d7c99b)
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