syntax_data: {"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // See https://github.com/rust-lang/unsafe-code-guidelines/issues/326
context_before:             // `noalias` for it. This can be turned off using an unstable flag.
context_after:             let noalias_for_box = tcx.sess.opts.unstable_opts.box_noalias;