Current master (73fc922ed64333d45f18d8a448f30cfa2ae0281e) crashes at the end of processing RPC `gettxoutsetinfo` on OS X:

```
$ ./bitcoind 
Assertion failed: (ok), function Next, file txdb.cpp, line 139.
Abort trap: 6
$ 
```

}
bool CBlockTreeDB::ReadBlockFileInfo(int nFile, CBlockFileInfo &info) {
    return Read(make_pair(DB_BLOCK_FILES, nFile), info);
}
bool CBlockTreeDB::WriteReindexing(bool fReindexing) {
    if (fReindexing)
        return Write(DB_REINDEX_FLAG, '1');
    else
        return Erase(DB_REINDEX_FLAG);
}
bool CBlockTreeDB::ReadReindexing(bool &fReindexing) {
    fReindexing = Exists(DB_REINDEX_FLAG);
    return true;
}
bool CBlockTreeDB::ReadLastBlockFile(int &nFile) {