Rust is a non-Garbage Collected (GCed) language, but the lack of GC makes expressing data-structures whose values have multiple owners awkward or inefficient. Adding GC to Rust has previously required sacrificing at least one of performance, soundness, or ergonomics. We identify the major challenge for practical GC for Rust as finalisers: mapping existing Rust destructors to GC finalisers seems natural but introduces subtle soundness, significant performance, and irritating ergonomic issues. In this talk, I’ll introduce Alloy, a new GC for Rust, and discuss how it provides solutions for each of these issues.