[njs] Rejection of multiple "var" declarations in the for-in statement.

[Valentin Bartenev]

details:   https://hg.nginx.org/njs/rev/a9a4ffdea79c
branches:  
changeset: 941:a9a4ffdea79c
user:      Valentin Bartenev <vbart at nginx.com>
date:      Thu May 02 21:21:16 2019 +0300
description:
Rejection of multiple "var" declarations in the for-in statement.

diffstat:

 njs/njs_parser.c         |  8 ++++++--
 njs/test/njs_unit_test.c |  3 +++
 2 files changed, 9 insertions(+), 2 deletions(-)

diffs (31 lines):

diff -r ae95d2637819 -r a9a4ffdea79c njs/njs_parser.c
--- a/njs/njs_parser.c	Thu May 02 11:08:44 2019 +0300
+++ b/njs/njs_parser.c	Thu May 02 21:21:16 2019 +0300
@@ -1078,8 +1078,12 @@ njs_parser_var_statement(njs_vm_t *vm, n
             return token;
         }
 
-        if (var_in && token == NJS_TOKEN_IN) {
-            return njs_parser_var_in_statement(vm, parser, name);
+        if (var_in) {
+            if (token == NJS_TOKEN_IN) {
+                return njs_parser_var_in_statement(vm, parser, name);
+            }
+
+            var_in = 0;
         }
 
         expr = NULL;
diff -r ae95d2637819 -r a9a4ffdea79c njs/test/njs_unit_test.c
--- a/njs/test/njs_unit_test.c	Thu May 02 11:08:44 2019 +0300
+++ b/njs/test/njs_unit_test.c	Thu May 02 21:21:16 2019 +0300
@@ -2265,6 +2265,9 @@ static njs_unit_test_t  njs_test[] =
     { nxt_string("for (null in undefined);"),
       nxt_string("ReferenceError: Invalid left-hand side \"null\" in for-in statement in 1") },
 
+    { nxt_string("for (var a, b in []);"),
+      nxt_string("SyntaxError: Unexpected token \"in\" in 1") },
+
     { nxt_string("var s = ''; for (var p in [1,2]) {s += p}; s"),
       nxt_string("01") },