Test for #1779: Incomplete member class definition : backend error in IDE
Fix for #1785: remember local type names because they get mangled up otherwise
Fix for #1785: properly keep track of anonymous classes we generate for local types in anonymous classes
Fix for #1779: Do not stop on parle/lex errors with -continue flag, except for module/package descriptors

For whom it would really go wrong
Fix for #1779: Make the side-effect of Errors methods more explicit
Fix for #1779: Do not generate `@Members` for members with errors
Fix for #1785: go up through anonymous classes in the model loader
Updated test .src for #1785: add `@Name` for local declarations
Updated test .src for language changes in Iterable.fold/scan
Test for #1785: local types in anonymous classes
ModelLoaderTest: only validate void return type for non-MPL methods