error[E0425]: cannot find value `LOG10_2` in module `std::f64` --> $DIR/issue-50599.rs:13:48 |LL | const M: usize = (f64::from(N) * std::f64::LOG10_2) as usize; //~ ERROR cannot find value | ^^^^^^^ not found in `std::f64`help: possible candidates are found in other modules, you can import them into scope |LL | use std::f32::consts::LOG10_2; |LL | use std::f64::consts::LOG10_2; |error: aborting due to previous errorFor more information about this error, try `rustc --explain E0425`.