Too-big literals can be smuggled into `println!`

[workingjubilee]

I tried this code:

fn main() {
    println!("{}", 0x1234567890123456789_i64);
}

I expected to see this happen:

Denial of an overflowing literal, like the following case would:

fn main() {
    let x = 0x1234567890123456789_i64;
    println!("{}", x);
}

Instead, this happened:

It worked??? It even printed out the right decimal number, 5373003641998677469065

Meta

rustc --version --verbose:

rustc 1.76.0-nightly (8c2b57721 2023-12-01)
binary: rustc
commit-hash: 8c2b57721728233e074db69d93517614de338055
commit-date: 2023-12-01
host: x86_64-unknown-linux-gnu
release: 1.76.0-nightly
LLVM version: 17.0.5

[saethlin]

Is this a duplicate of #117949 ?

[workingjubilee]

yup! sorry about that.

[workingjubilee]

@saethlin: I'm not actually sure if the issue you opened is a duplicate
@saethlin: Behold, no constants in the MIR: https://godbolt.org/z/P56ooWxcz

Guess I'm wrong. :P

[gurry]

A duplicate of #115423