syntax_data: {"ast_node_type":"variable","tokens":[{"end":96,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let mut check_overflow = attr::contains_name(attrs, sym::rustc_inherit_overflow_checks);
context_before:         // the settings for the crate they are codegened in.
context_after:         // Respect -C overflow-checks.