Scenario walk-through:

1. compile redis, run the server, and connect to the server using redis-cli.
2. type the following commands:
   hset myhash myhashname "first redis hash"
   bgsave
3. run redis check dump on the dump.rdb that has just been created
4. receiving the following output
   ==== Processed 0 valid opcodes (in 0 bytes) ====================================
   ==== Error trace (SELECTDB) ====================================================
   0x0000000b - Followed by invalid type
   0x00000009 - Error for type SELECTDB
   ==== Processed 0 valid opcodes (in 0 bytes) ====================================
   ==== Error trace ===============================================================
   0x0000003b - Expected EOF, got
   CRC64 checksum is OK

I guess the cause of these errors is related to not considering the hash zip list object type as a valid object type.
You can see how I have "fixed" it on my forked repository:
https://github.com/ripcurld00d/redis/commit/24c7386c401dd92f98781ab0e3ae9bc0516a790b

Although, I am not sure if that is the correct way to solve the problem.

Thanks in advance. :)