syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"max_atomic_width:"}]}
source_snippet:             max_atomic_width: Some(64),
context_before:             features: "+vfp3,+neon".into(),
context_after:             // FIXME(jordanrh): use PanicStrategy::Unwind when SEH is