From c852c5d2721fd017fb2a61528618f3b8e060f6d5 Mon Sep 17 00:00:00 2001
From: HyeockJinKim <kherootz@gmail.com>
Date: Thu, 12 Sep 2019 01:01:04 +0900
Subject: [PATCH] nonlocal generate syntax error

If the scope depth is less than 2,
a syntax error occurs in nonlocal.

Fixes #1360
---
 src/symboltable.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/symboltable.rs b/src/symboltable.rs
index 1578f47..f1cc1a8 100644
--- a/src/symboltable.rs
+++ b/src/symboltable.rs
@@ -211,7 +211,8 @@ impl<'a> SymbolTableAnalyzer<'a> {
                 // symbol.table.borrow().parent.clone();
 
                 if let Some((symbols, _)) = parent_symbol_table {
-                    if !symbols.contains_key(&symbol.name) {
+                    let scope_depth = self.tables.len();
+                    if !symbols.contains_key(&symbol.name) || scope_depth < 2 {
                         return Err(SymbolTableError {
                             error: format!("no binding for nonlocal '{}' found", symbol.name),
                             location: Default::default(),