From 6867829c9e28ad89b8720831732b0b297a8076e3 Mon Sep 17 00:00:00 2001
From: Igor Sysoev <igor@sysoev.ru>
Date: Tue, 4 Apr 2017 10:47:02 +0300
Subject: [PATCH] Global variables may be accessed incorrectly by nested
 functions.

---
 njs/njs_variable.c       | 6 +++++-
 njs/test/njs_unit_test.c | 4 ++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/njs/njs_variable.c b/njs/njs_variable.c
index f6e05591..03a28e01 100644
--- a/njs/njs_variable.c
+++ b/njs/njs_variable.c
@@ -322,7 +322,11 @@ njs_variable_get(njs_vm_t *vm, njs_parser_node_t *node)
         goto not_found;
     }
 
-    n = (node->scope->nesting != vs.scope->nesting);
+    n = 0;
+
+    if (vs.scope->type > NJS_SCOPE_GLOBAL) {
+        n = (node->scope->nesting != vs.scope->nesting);
+    }
 
     var = vs.variable;
     index = var->index;
diff --git a/njs/test/njs_unit_test.c b/njs/test/njs_unit_test.c
index 81f729c5..4a5aaa7c 100644
--- a/njs/test/njs_unit_test.c
+++ b/njs/test/njs_unit_test.c
@@ -4319,6 +4319,10 @@ static njs_unit_test_t  njs_test[] =
                  "var y = f(); y()"),
       nxt_string("6") },
 
+    { nxt_string("var x; var y = 4;"
+                 "function f() { function h() { x = 3; return y; } }"),
+      nxt_string("undefined") },
+
     /* Recursive fibonacci. */
 
     { nxt_string("function fibo(n) {"
-- 
2.47.3