Confusing overflow error messages in printf

[ske2004]

fn main() {
    x := 0xABCDEF123
    printf("%x\n", x)
}

expected output: printf type error because int64 doesn't fit into uint32
output: overflow of uint32

fn main() {
    x := 1e142
    printf("%f\n", x)
}

expected output: printf type error because real doesn't fit into real32
output: overflow of real32