This fixes an assertion error that gets thrown if:
1. A module declares a class as abstract
2. An amending module does not use that abstract class as a type
Underneath the hood, the modifiers of the class/typelias object member
is considered different from the modifiers on the VmClass/VmTypeAlias
values.
The object model skips forcing any explicitly members that are explicitly
declared hidden, abstract, or local.
However, it _should_ evaluate any abstract classes found in a module.
So, it's incorrect to apply the same modifiers on the class to the object member.
When I delete pkl-core/src/test/files/LanguageSnippetTests/output and
run "gw test", most output files are regenerated, but 46 of them aren't.
I assume these are stale files that should be deleted.
The body of a typealias gets inlined into wherever the typealias
is used. This fixes a bug where the references in the typealias body can
resolve to the wrong value.
Daniel Chao