{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"//"}]}
            // so no one thinks we parsed them setting `RUST_MIN_STACK="64 megabytes"`
            // rustc is a batch program, so error early on inputs which are unlikely to be intended
            // FIXME: we could accept `RUST_MIN_STACK=64MB`, perhaps?