syntax_data: {"ast_node_type":"variable","tokens":[{"end":40,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let normal_exit_block = f(self);
context_before:         self.scopes.const_continuable_scopes.push(scope);
context_after:         let const_continue_scope = self.scopes.const_continuable_scopes.pop().unwrap();