When reproduction fails, checking the same nightly when the start day and end day are the same

[reddevilmidzy]

If the start day and end day are the same when reproduction fails, check for duplicate nightly.

code

#![allow(incomplete_features, unused)]
#![feature(min_generic_const_args)]
#![feature(inherent_associated_types)]
struct Foo<'a> {
    x: &'a (),
}

impl<'a> Foo<'a> {
    #[type_const]
    const X: usize = 1;
    fn foo(_: [u8; Foo::X]) {}
}

fn main() {}

command

cargo bisect-rustc --start 2026-01-09 --end 2026-01-09 --regress=non-ice

log

checking the start range to find a passing nightly
installing nightly-2026-01-09
rust-std-nightly-x86_64-pc-windows-msvc: 21.22 MB / 21.22 MB [===========================================================================] 100.00 % 9.07 MB/s testing...
RESULT: nightly-2026-01-09, ===> Found ICE
uninstalling nightly-2026-01-09

checking the end range to verify it does not pass
installing nightly-2026-01-09
rust-std-nightly-x86_64-pc-windows-msvc: 21.22 MB / 21.22 MB [==========================================================================] 100.00 % 10.70 MB/s testing...
RESULT: nightly-2026-01-09, ===> Found ICE
uninstalling nightly-2026-01-09

ERROR: the end of the range (nightly-2026-01-09) does not reproduce the regression

[apiraino]

I think this is a duplicate of #85 (or at least very closely related)