syntax_data: {"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"assert!(!tcx.type_is_copy_modulo_regions(this.typing_env(),"}]}
source_snippet:                 assert!(!tcx.type_is_copy_modulo_regions(this.typing_env(), ty));
context_before:                 // !sized means !copy, so this is an unsized move