debug_traceTransaction returning server error when using prestateTracer

[Juuddi]

System information

Go-quai version: sandbox RPC endpoint
OS & Version: OSX

Expected behaviour

When using debug_traceTransaction to get a transaction trace, passing the prestateTracer option should return a pre-state trace for the transaction.

Actual behaviour

Passing the prestateTracer option to the method results in this error:

{
    "jsonrpc": "2.0",
    "id": 1,
    "error": {
        "code": -32000,
        "message": "TypeError: cannot read property '0x002a8cf994379232561556da89c148...' of null    in server-side tracer function 'result'"
    }
}

Steps to reproduce the behaviour

Send a trace request using the prestateTracer option

{
    "jsonrpc": "2.0",
    "method": "debug_traceTransaction",
    "params": [
        "0x006200484e799b43aa324e7e7fd80458c562dc1eb303ddb4ba9bff5e371b47ae", // can replace with {{transactionHash}}
        { "tracer": "prestateTracer" } // other option is "callTracer"
    ],
    "id": 1
}

[mibuono]

Need to rewrite debugTraceTransaction in Go before we handle this issue.