"Corrosion, formerly known as cmake-cargo, is a tool for integrating Rust into an existing CMake project. Corrosion can automatically import executables, static libraries, and dynamic libraries from a workspace or package manifest (Cargo.toml file)." New, so far optional dependency of kde-apps/akonadi-search, supposedly serving as a crashfix: "Parse html with rust This prevents us from having to use QTextDocument to parse untrusted html emails. Resulting in crashes or worse security issues. QTextDocument is still used in case corrosion is not found" https://invent.kde.org/pim/akonadi-search/-/commit/adc0eedab1456c43c9e4c0989ce7c9eb76e0160c
