{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"//!"}]}
//! We must be extremely careful to only apply optimizations that preserve UB and all
//! so its effects may affect the type-checking, borrow-checking, and other analysis of MIR.
//! non-determinism, since changes here can affect which programs compile in an insta-stable way.