Declaration in the head of a for-of loop can't have an initializer (#4804)

JerryScript-DCO-1.0-Signed-off-by: Robert Sipka [email protected]

Co-authored-by: Robert Sipka <[email protected]>

Author: robertsipka

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

@@ -1414,7 +1414,7 @@ parser_parse_for_statement_start (parser_context_t *context_p) /**< context */
         if (context_p->token.type == LEXER_ASSIGN)
         {
 #if JERRY_ESNEXT
-          if (context_p->status_flags & PARSER_IS_STRICT)
+          if ((context_p->status_flags & PARSER_IS_STRICT) || !is_for_in)
           {
             parser_raise_error (context_p, PARSER_ERR_FOR_IN_OF_DECLARATION);
           }

tests/jerry/initializer-in-for-of-statement-head.js

@@ -0,0 +1,25 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function parse(txt) {
+    try {
+        eval(txt)
+        assert(false)
+    } catch (e) {
+        assert(e instanceof SyntaxError)
+    }
+}
+
+parse("for (var x = 1 of []) { }")

tests/test262-esnext-excludelist.xml

@@ -343,11 +343,8 @@
   <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-const-init.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-let-init.js"><reason></reason></test>
-  <test id="language/statements/for-of/head-var-init.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>
@@ -7702,9 +7699,6 @@
   <test id="language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-get-value-err.js"><reason></reason></test>
   <test id="language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-throws.js"><reason></reason></test>
   <test id="language/statements/for-await-of/async-gen-dstr-var-obj-ptrn-prop-id-init-unresolvable.js"><reason></reason></test>
-  <test id="language/statements/for-await-of/head-const-init.js"><reason></reason></test>
-  <test id="language/statements/for-await-of/head-let-init.js"><reason></reason></test>
-  <test id="language/statements/for-await-of/head-var-init.js"><reason></reason></test>
   <test id="language/statements/for-await-of/let-block-with-newline.js"><reason></reason></test>
   <test id="language/statements/for-await-of/let-identifier-with-newline.js"><reason></reason></test>
   <test id="language/statements/for-await-of/ticks-with-sync-iter-resolved-promise-and-constructor-lookup.js"><reason></reason></test>