TIL: Rust's lack of HKTs can cause inductive cycles that ICE the compiler

A blog post explores how emulating Higher-Kinded Types (HKTs) in Rust using GATs on recursive types causes trait evaluation overflow (E0275) due to Rust's inductive trait solver creating circular dependency chains. The issue stems from Rust only supporting coinductive proof trees for auto-traits like Send/Sync, not for derived traits like PartialEq. A fix is expected with the next-generation trait solver, and the pattern can even trigger an internal compiler error (ICE) with experimental solver flags.