syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if t.outer_exclusive_binder() > self.outer_index {
context_before:         // content in `t`). Therefore, `t` has some escaping vars.
context_after:             ControlFlow::Break(FoundEscapingVars)