contract C {
    function f() pure external returns (uint id) {
        assembly {
            id := chainid()
        }
    }
    function g() view external returns (uint sb) {
        assembly {
            sb := selfbalance()
        }
    }
}
// ====
// EVMVersion: =petersburg
// ----
// TypeError 1561: (101-108): The "chainid" instruction is only available for Istanbul-compatible VMs (you are currently compiling for "petersburg").
//  DeclarationError 8678: (95-110): Variable count for assignment to "id" does not match number of values (1 vs. 0)
// TypeError 7721: (215-226): The "selfbalance" instruction is only available for Istanbul-compatible VMs (you are currently compiling for "petersburg").
// DeclarationError 8678: (209-228): Variable count for assignment to "sb" does not match number of values (1 vs. 0)