syntax_data: {"ast_node_type":"other","tokens":[{"end":37,"kind":"keyword","start":0,"text":"ExprKind::Block"}]}
source_snippet:             ExprKind::Block { block }
context_before:             ExprKind::Break { .. } | ExprKind::Continue { .. } | ExprKind::Return { .. } => (),
context_after:                 if let Block { expr: None, targeted_by_break: false, .. } = this.thir[block]