the getArgumentCount() call in IfcEntityInstanceData destructor isn't virtually dispatched so it returns 0 instead of correct number of arguments => memory leak
added IfcEntityInstanceData::clearArguments() which clears all arguments and resets the attributes_ field to nullptr
Remove unnecessary copy in IfcEntityInstanceData::setArgument() when argument is created at the call site (no more leak of original argument)
Fix memory leak in IfcFile: delete entities from both byid and entity_file_map
attributes_ was allocated as an array of Argument pointers but the pointers were uninitialized in the construction. Initialization was done in the HeaderEntity class constructor.
offset_in_file_ is uninitialized in one constructor
Adrien SCHVALBERG