Assignment Expression is not allowed in for of head's expression position (#4810)

JerryScript-DCO-1.0-Signed-off-by: Robert Sipka robert.sipka@h-lab.eu

jerry-core/parser/js/js-parser-statm.c

@@ -1289,7 +1289,8 @@ parser_parse_for_statement_start (parser_context_t *context_p) /**< context */
 #endif /* JERRY_ESNEXT */
 
     lexer_next_token (context_p);
-    parser_parse_expression (context_p, PARSE_EXPR);
+    int options = is_for_in ? PARSE_EXPR : PARSE_EXPR_LEFT_HAND_SIDE;
+    parser_parse_expression (context_p, options);
 
     if (context_p->token.type != LEXER_RIGHT_PAREN)
     {

tests/jerry/es.next/for-of.js

@@ -56,7 +56,15 @@ var forOf =
   "for (var a \"of\" []) {}"
 parse (forOf)
 
-checkError(5)
+var forOf =
+  "for (let x of [], []) {}"
+parse (forOf)
+
+var forOf =
+  "for (var x of [], []) {}"
+parse (forOf)
+
+checkError(7)
 
 var obj = {}
 Object.defineProperty(obj, Symbol.iterator, { get : function () { throw TypeError ('foo');}});

tests/test262-esnext-excludelist.xml

@@ -343,9 +343,6 @@
   <test id="language/statements/for-of/cptn-expr-abrupt-empty.js"><reason></reason></test>
   <test id="language/statements/for-of/cptn-expr-itr.js"><reason></reason></test>
   <test id="language/statements/for-of/cptn-expr-no-itr.js"><reason></reason></test>
-  <test id="language/statements/for-of/head-decl-no-expr.js"><reason></reason></test>
-  <test id="language/statements/for-of/head-expr-no-expr.js"><reason></reason></test>
-  <test id="language/statements/for-of/head-var-no-expr.js"><reason></reason></test>
   <test id="language/statements/for-of/let-block-with-newline.js"><reason></reason></test>
   <test id="language/statements/for-of/let-identifier-with-newline.js"><reason></reason></test>
   <test id="language/statements/for-of/scope-body-lex-open.js"><reason></reason></test>