When resyncing liboverrides, a missing root of the liboverride
hierarchy (i.e. if the hierarchy root linked reference ID is
missing) will prevent any attempt to resync any data in that
liboverride hierarchy. This is done to prevent resync code breaking
existing overrides upon missing linked data
(5f67b25c28).
Refactored parts of the liboverride partial resync process to
address known error reports
(40d79e3d2b,
07dfc6eccc).
Potential local references to virtual linked liboverrides are now
restored 'as best as possible' on resync (PR#107144,
527b21f0ae).
Note that in general user should avoid such referencing to linked
data generated from the recursive process, as it is by definition
very 'unstable' and does not actually exist in any file storage.
Data arrays are now shared between copies, resulting in an overall
memory usage reduction of at least 25% with large geometries
(7eee378ecc,
dcb3b1c1f9).