Reported here: https://github.com/bitcoin/bitcoin/pull/10244#issuecomment-378035305

Travis log here: https://travis-ci.org/bitcoin/bitcoin/jobs/361243719#L2810

Note the JSON exception:

```
test_framework.authproxy.JSONRPCException: The mempool was not loaded yet (-1) 
```

That exception was introduced here: https://github.com/bitcoin/bitcoin/commit/cb1e319fe9e198c9c5cf5236fe9af5a3d748b9e8#diff-a0c8f511d90e83aa9b5857e819ced344R1617

cc @jtimon 
public:
    CVerifyDB();
    ~CVerifyDB();
    bool VerifyDB(const CChainParams& chainparams, CCoinsView *coinsview, int nCheckLevel, int nCheckDepth);
};
bool ReplayBlocks(const CChainParams& params, CCoinsView* view);
inline CBlockIndex* LookupBlockIndex(const uint256& hash)
{
    AssertLockHeld(cs_main);
    BlockMap::const_iterator it = mapBlockIndex.find(hash);
    return it == mapBlockIndex.end() ? nullptr : it->second;
}
CBlockIndex* FindForkInGlobalIndex(const CChain& chain, const CBlockLocator& locator) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
/** Mark a block as precious and reorganize.
 *
 * May not be called in a
 * validationinterface callback.
 */
bool PreciousBlock(CValidationState& state, const CChainParams& params, CBlockIndex *pindex) LOCKS_EXCLUDED(cs_main);
bool InvalidateBlock(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindex) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
void ResetBlockFailureFlags(CBlockIndex* pindex) EXCLUSIVE_LOCKS_REQUIRED(cs_main);