syntax_data: {"ast_node_type":"variable","tokens":[{"end":89,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if let Some(err) = sess.dcx().steal_non_err(span, StashKey::EarlySyntaxWarning) {
context_before:     if let Some(span) = span.primary_span() {
context_after:             err.cancel()