syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // We have skipped a feature gate, and not run into other errors... reject.
context_before:             if must_err && self.dcx().has_errors().is_none() {
context_after:                 guar = Some(self.dcx().emit_err(errors::NotCircumventFeature));