Comment by Didier Vibert on 2023-11-07 08:42:15:
may be implemented at the same time than the handling of the scope at python level with the management of the stage level.

I propose to define a python context manager for dealing with stage/solver scopes, pushing a new scope at beginning, popping the scope and collect/store the warning flag in the resultStore at finalization. The use of the context manager (@with@ statement) could also be embedded in a decorator (as it is the case already for trapping exceptions). The advantage of using a context manager instead of explicitly storing the warning flag at the exception level, is that there will then be only one place (in the code) for storing each warning flag: at the ending of the corresponding context, whatever causes the end, ie exception or normal ending.