panic: 'entered unreachable code: This should never happen' in find_point_resolution

[correctmost]

zuban crashes when checking this fuzzed code:

C
try:
    class C:
        pass

Panic context:
> /home/user/b.py

thread 'main' (3085682) panicked at crates/zuban_python/src/file/name_resolution.rs:498:25:
internal error: entered unreachable code: This should never happen b(14):#3

#189 (comment) mentioned the same panic, but I'm not sure if it had the same root cause.

Version info

1adc194