syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // !sized means !copy, so this is an unsized move
context_before:             if !ty.is_sized(tcx, this.typing_env()) {
context_after:                 assert!(!tcx.type_is_copy_modulo_regions(this.typing_env(), ty));