Bug Fix: Fixed bug in parser that caused incorrect errors in chains of comparison or "in"/"not in" operators. The expression "a == b == c" should be parsed as "a == (b == c)", but the code was previously parsing it as "(a == b) == c". This didn't matter in most cases, but it does when the types of a, b and c differ.
Bug Fix: Fixed bug that resulted in incorrect errors when an instance variable with no type declaration was assigned an enum value. It was assumed to be of that literal enum value type rather than the wider enum type.
Bug Fix: Fixed bug that resulted in false positive error when a class derived from another class that was instantiated from a custom metaclass.
Bug Fix: Fixed bug that caused type errors when internal type cache was cleared. The code previously used parse node IDs to distinguish between types that are not created via class declarations (NamedTuple, type, NewType, etc.). Since node IDs change when a file is reparsed (due to a change), these IDs cannot be relied upon for type comparisons.
Enhancement: Added support for "typing" module aliases when checking for TYPE_CHECKING symbol in static boolean expressions.
Behavior Change: Removed recently-added "reportInvalidTypeVarUse" diagnostic rule and associated checks. After further discussion, we decided that there are legitimate cases where a TypeVar can appear only once in a function signature.