syntax_data: {"ast_node_type":"import","tokens":[{"end":85,"kind":"keyword","start":0,"text":"#[rustc_lint_opt_deny_field_access(\"use"}]}
source_snippet:     #[rustc_lint_opt_deny_field_access("use `Session::teach` instead of this field")]
context_before:         "control if mem::uninitialized and mem::zeroed panic on more UB"),
context_after:     teach: bool = (false, parse_bool, [TRACKED],