development_genesis.json

{
    "nonce": "0x0000000000000042",
    "difficulty": "0x40000",
    "alloc": {
            "bbbbbaaaaa82db86a35502193b4c6ee9a76ebe8f": {
            "balance": "10015200000000000000000"
        }
    },
    "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "coinbase": "0x0000000000000000000000000000000000000000",
    "timestamp": "0x00",
    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "extraData": "0x",
    "gasLimit": "0x4c4b40"
}

Same issue

Fatal: invalid character '}' looking for beginning of object key string

Kindly guide how to sort this issue. System is 16GB RAM with i7 + ATI Radeon 8k series. Mining should not be a issue.

Seems like some thing wrong with genesis file

I am having the same issue
WARNING: No etherbase set and no accounts found as default
...
Fatal: invalid character '}' looking for beginning of object key string
Fatal: invalid character '}' looking for beginning of object key string
edit:

okay so this issue is caused by an extra comma at line 7. Removing it solved this particular issue.

Weird that it never errored for me, made the changes :)