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 
pcoinscatcher.reset(new CCoinsViewErrorCatcher(pcoinsdbview.get()));
                
                
                if (!pcoinsdbview->Upgrade()) {
                    strLoadError = _("Error upgrading chainstate database");
                    break;
                }
                
                if (!ReplayBlocks(chainparams, pcoinsdbview.get())) {
                    strLoadError = _("Unable to replay blocks. You will need to rebuild the database using -reindex-chainstate.");
                    break;
                }
                
                pcoinsTip.reset(new CCoinsViewCache(pcoinscatcher.get()));
                bool is_coinsview_empty = fReset || fReindexChainState || pcoinsTip->GetBestBlock().IsNull();
                if (!is_coinsview_empty) {
                    
                    if (!LoadChainTip(chainparams)) {
                        strLoadError = _("Error initializing block database");
                        break;
                    }
                    assert(chainActive.Tip() != nullptr);
                }
                if (!fReset) {
                    
                    
                    
                    uiInterface.InitMessage(_("Rewinding blocks..."));
                    if (!RewindBlockIndex(chainparams)) {
                        strLoadError = _("Unable to rewind the database to a pre-fork state. You will need to redownload the blockchain");