The "is_multiple_of" method on unsigned types was only stabilised in Rust 1.87. But unicode-segmentation 1.13.1 doesn't list an MSRV, so my crate's 1.85 CI build cheerfully downloads it (as a nested dependency of ratatui) and then fails.

Using "is_multiple_of" in grapheme.rs is certainly clearer than open-coding it. But if you're going to keep it, could you add a rust-version tag for 1.87 to your Cargo.toml? that way modern resolvers won't select unicode-segmentation 1.13.1 when targeting Rusts as old as 1.85.

Version 1.12 of unicode-segmentation doesn't use "is_multiple_of", and so works fine on Rust 1.85.

(Conversely, if you'd declared an older MSRV, your CI wouldn't have moaned at you about not using "is_multiple_of".)