Move the late creation of the container up. Implement sanity check for decl uniqueness when in debug mode.
Move the late creation of the container up. Implement sanity check for decl uniqueness when in debug mode.

karies/cling,perovic/cling,perovic/cling,root-mirror/cling,marsupial/cling,root-mirror/cling,marsupial/cling,root-mirror/cling,perovic/cling,root-mirror/cling,root-mirror/cling,karies/cling,perovic/cling,marsupial/cling,marsupial/cling,karies/cling,root-mirror/cling,marsupial/cling,karies/cling,karies/cling,perovic/cling,karies/cling,marsupial/cling