PrestateTracer returns wrong balance for tx sender

[s1na]

The prestateTracer reverts the value transfer of a transaction in result:

go-ethereum/eth/tracers/internal/tracers/prestate_tracer.js

Lines 57 to 58 in 7a509b4

	this.prestate[toHex(ctx.to)].balance = '0x'+toBal.subtract(ctx.value).toString(16);
	this.prestate[toHex(ctx.from)].balance = '0x'+fromBal.add(ctx.value).toString(16);

But it doesn't revert the gas bought here:

go-ethereum/core/state_transition.go

Line 167 in b211742

st.state.SubBalance(st.msg.From(), mgval)

and therefore returns the tx sender's balance - (gasPrice * gasLimit).