Panic related to peers cache

[tomaka]

cc #2898

panicked at 'assertion failed: _prev_value.is_none()', /home/tomaka/Projets/smoldot/src/libp2p/peers.rs:1220:21

smoldot/src/libp2p/peers.rs

Line 1220 in 2baf614

debug_assert!(_prev_value.is_none());

[tomaka]

Can be reproduced by running #2876 with the Polkadot chain.

[tomaka]

Can be reproduced by running #2876 with the Polkadot chain.

Can't reproduce anymore.
This is a bit annoying, as reviewing the code again doesn't reveal any mistake to me.