panic: internal error: entered unreachable code: NotDefinedYet

[correctmost]

zuban check crashes when checking this fuzzed code:

from typing import TypedDict

class C[int](TypedDict):
    a = int

    def fn(b: int):
        pass

thread 'main' panicked at crates/zuban_python/src/type_helpers/class.rs:1189:22:
internal error: entered unreachable code: NotDefinedYet { class_ref: ClassNodeRef(NodeRef { node: "class C[int](TypedDict):\n    a = int\n\n  ", point: Point { kind: Complex, locality: NameBinder, node_index: 0, needs_flow_analysis: false }, complex: "ClassStorage { .. }", file_index: FileIndex(14), node_index: 15 }) }

Version info

3963508