missing block hash in the logs of system tx.

[unclezoro]

System information

Geth version: 1.1.2
OS & Version: Windows/Linux/OSX
Commit hash : latest

Expected behaviour

eth.getTransactionReceipt("0xa1f96d672ab4fa2782d1b9acb38b95a19ac64541b40caefbbe549b664172d705")

return correct response.

Actual behaviour

eth.getTransactionReceipt("0xa1f96d672ab4fa2782d1b9acb38b95a19ac64541b40caefbbe549b664172d705")
{
blockHash: "0xca3e86e69d0958fe1e1fc1990ea51e3a44e8da5915c34162928f51e07a30de61",
blockNumber: 13045778,
contractAddress: null,
cumulativeGasUsed: 176795,
from: "0xf474cf03cceff28abc65c9cbae594f725c80e12d",
gasUsed: 17150,
logs: [{
address: "0x0000000000000000000000000000000000001000",
blockHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
blockNumber: 13045778,
data: "0x0000000000000000000000000000000000000000000000000005abf67b26d400",
logIndex: 4,
removed: false,
topics: ["0x93a090ecc682c002995fad3c85b30c5651d7fd29b0be5da9d784a3302aedc055", "0x000000000000000000000000f474cf03cceff28abc65c9cbae594f725c80e12d"],
transactionHash: "0xa1f96d672ab4fa2782d1b9acb38b95a19ac64541b40caefbbe549b664172d705",
transactionIndex: 3
}],
logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000200000000000000000002010000000000000000000000000000000000020000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000",
status: "0x1",
to: "0x0000000000000000000000000000000000001000",
transactionHash: "0xa1f96d672ab4fa2782d1b9acb38b95a19ac64541b40caefbbe549b664172d705",
transactionIndex: 3,
type: "0x0"
}

The block hash of logs is empty.

Steps to reproduce the behaviour

Backtrace

[backtrace]

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