Possible cast_possible_truncation false positive

[leonardo-m]

Summary

This code:

#![warn(clippy::pedantic)]

fn main() {
    const X: usize = 100_000;
    const X2: u32 = X as _;
    dbg!(X);
    dbg!(X2);
}

Gives:

warning: casting `usize` to `u32` may truncate the value on targets with 64-bit wide pointers
 --> src/main.rs:5:21
  |
5 |     const X2: u32 = X as _;
  |                     ^^^^^^
  |
note: the lint level is defined here
 --> src/main.rs:1:9
  |
1 | #![warn(clippy::pedantic)]
  |         ^^^^^^^^^^^^^^^^
  = note: `#[warn(clippy::cast_possible_truncation)]` implied by `#[warn(clippy::pedantic)]`
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_possible_truncation

Perhaps this pedantic warning could be generated only if there's an actual truncation. Here 100_000 fits in 32 bits.

Lint Name

No response

Reproducer

I tried this code:

<code>

I saw this happen:

<output>

I expected to see this happen:

Version

No response

Additional Labels

No response

[jyn514]

I think this is a duplicate of #9613.

[leonardo-m]

Right.