SystemTime::duration_since nightly regression

[stepancheg]

use std::time::SystemTime;
use std::time::Duration;

fn main() {
    let t = SystemTime::UNIX_EPOCH;
    let early = t - (Duration::from_secs(i64::MAX as u64 + 1));
    let later = t + (Duration::from_secs(i64::MAX as u64) + Duration::from_nanos(999_999_999));
    let delta = later.duration_since(early).unwrap();
    eprintln!("{early:?}");
    eprintln!("{delta:?}");
}

works on stable (1.89.0) and beta (1.90.0-beta.7 (2025-08-29 fb918ce)), but returns error on nightly (1.91.0-nightly (2025-09-04 af00ff2)).

Play

Probably introduced in #144519 (CC @clarfonthey).

[eval-exec]

@rustbot claim

Try to fix in #146247