1.99.0 nightly #

Unreleased

• Will be stable on: 1 October, 2026
• Will branch from master on: 14 August, 2026

• Add Step::forward/backward_overflowing to enable RangeInclusive loop optimizations (merged 3 days ago)
• Implement IntoIterator for [&[mut]] Box<[T; N], A> (merged 7 days ago)
• Tracking issue for release notes of #156976: enable eager param_env norm in new solver (merged 9 days ago)