Current bitcoin-master on testnet, `maxconnections=8` in the config file. Running in VM that doesn't have public IP and is not reachable from the Internet.

Wait until you have 8 peers.

```
telnet localhost 18333
```

It will result in:

```
Assertion failed: (nMaxInbound > 0), function AcceptConnection, file net.cpp, line 973.
```

First found in https://github.com/bitcoin/bitcoin/pull/8996, but can be reproduced on master.

if (!AttemptToEvictConnection()) {
            
            LogPrint("net", "failed to find an eviction candidate - connection dropped (full)\n");
            CloseSocket(hSocket);
            return;
        }
    }
    CNode* pnode = new CNode(GetNewNodeId(), nLocalServices, GetBestHeight(), hSocket, addr, CalculateKeyedNetGroup(addr), "", true);
    GetNodeSignals().InitializeNode(pnode->GetId(), pnode);
    pnode->AddRef();
    pnode->fWhitelisted = whitelisted;
    LogPrint("net", "connection from %s accepted\n", addr.ToString());
    {
        LOCK(cs_vNodes);
        vNodes.push_back(pnode);
    }
}
void CConnman::ThreadSocketHandler()
{
    unsigned int nPrevNodeCount = 0;
    while (true)
    {
        
        
        
        {
            LOCK(cs_vNodes);
            
            std::vector<CNode*> vNodesCopy = vNodes;
            BOOST_FOREACH(CNode* pnode, vNodesCopy)