Bug: panic `link id not match` with `tlfu` and `size=2`

[econtal]

I got the following error while writing unit-tests. Interestingly I got the error only with size=1 or size=2. So I hope it only impacts testing and not real life, but that's still unexpected.

from datetime import timedelta
from theine import Cache

def test(size):
    cache = Cache('tlfu', size)
   # set 1 and get it many times to make it the most frequently used
    cache.set(1, 1, timedelta(seconds=1000))
    for _ in range(10 * size):
        assert cache.get(1) == 1
    # fill the cache with keys that are never read again
    for i in range(10 * size):
        cache.set(i, i, timedelta(seconds=1000))      
    # get 1 again
    # note that I do not get the panic error if you remove the next line
    assert cache.get(1) == 1
    # try to write dummy keys again
    for i in range(10 * size):
        cache.set(i, i, timedelta(seconds=1000))

test(2)  # raises
test(3)  # ok

raises:

thread '<unnamed>' panicked at 'link id not match', src/metadata.rs:159:13
stack backtrace:
  [...]
  10:        0x1022dcd63 - core::panicking::panic_fmt::hc10ef4c7e7c3da2e
  11:        0x102290ac5 - theine_core::metadata::Link::remove_wheel::hac48c6eac45dc96a
  12:        0x10228dfbb - theine_core::core::TlfuCore::set::h794298ae1966b4d2
  13:        0x10228b809 - std::panicking::try::hec7d762371985e37
  [...]

[Yiling-J]

@econtal Thanks for reporting. let me fix it this weekend

[Yiling-J]

@econtal please upgrade theine-core to v0.4.3 and try again 🙏

[econtal]

I confirm it's fixed, thanks a lot!