Apparently in some conditions it is possible to ask for the extruders use list at a layer that don't have one. It is also possible to get an empty list for an existing layer. In both cases this cas lead to crashes because somes consumers of this list assume it is not empty.
These changes add protections for those cases, while not changing the "normal" situations.
Apparently in some conditions it is possible to ask for the extruders use list at a layer that don't have one. It is also possible to get an empty list for an existing layer. In both cases this cas lead to crashes because somes consumers of this list assume it is not empty. These changes add protections for those cases, while not changing the "normal" situations.
CURA-11757