From c9bddfca7eb5ef4642bdd8f27e35b9e2f4de65c9 Mon Sep 17 00:00:00 2001
From: Gaming4JC <g4jc@hyperbola.info>
Date: Sat, 14 Dec 2019 10:42:18 -0500
Subject: Bug 1352312 - Enable Async Iteration.

Tag #1287
---
 js/src/frontend/Parser.cpp | 20 --------------------
 js/src/js.msg              |  1 -
 2 files changed, 21 deletions(-)

diff --git a/js/src/frontend/Parser.cpp b/js/src/frontend/Parser.cpp
index 2d2f17fd1..cf9f1e27c 100644
--- a/js/src/frontend/Parser.cpp
+++ b/js/src/frontend/Parser.cpp
@@ -3785,12 +3785,6 @@ Parser<ParseHandler>::functionStmt(uint32_t toStringStart, YieldHandling yieldHa
 
     GeneratorKind generatorKind = NotGenerator;
     if (tt == TOK_MUL) {
-#ifdef RELEASE_OR_BETA
-        if (asyncKind != SyncFunction) {
-            error(JSMSG_ASYNC_GENERATOR);
-            return null();
-        }
-#endif
         generatorKind = StarGenerator;
         if (!tokenStream.getToken(&tt))
             return null();
@@ -3859,12 +3853,6 @@ Parser<ParseHandler>::functionExpr(uint32_t toStringStart, InvokedPrediction inv
         return null();
 
     if (tt == TOK_MUL) {
-#ifdef RELEASE_OR_BETA
-        if (asyncKind != SyncFunction) {
-            error(JSMSG_ASYNC_GENERATOR);
-            return null();
-        }
-#endif
         generatorKind = StarGenerator;
         if (!tokenStream.getToken(&tt))
             return null();
@@ -6156,7 +6144,6 @@ Parser<ParseHandler>::forStatement(YieldHandling yieldHandling)
         }
     }
 
-#ifndef RELEASE_OR_BETA
     if (pc->isAsync()) {
         bool matched;
         if (!tokenStream.matchToken(&matched, TOK_AWAIT))
@@ -6167,7 +6154,6 @@ Parser<ParseHandler>::forStatement(YieldHandling yieldHandling)
             iterKind = IteratorKind::Async;
         }
     }
-#endif
 
     MUST_MATCH_TOKEN(TOK_LP, JSMSG_PAREN_AFTER_FOR);
 
@@ -9520,12 +9506,6 @@ Parser<ParseHandler>::propertyName(YieldHandling yieldHandling,
     }
 
     if (ltok == TOK_MUL) {
-#ifdef RELEASE_OR_BETA
-        if (isAsync) {
-            error(JSMSG_ASYNC_GENERATOR);
-            return null();
-        }
-#endif
         isGenerator = true;
         if (!tokenStream.getToken(&ltok))
             return null();
diff --git a/js/src/js.msg b/js/src/js.msg
index f8e5358bb..9dc5f4e9f 100644
--- a/js/src/js.msg
+++ b/js/src/js.msg
@@ -185,7 +185,6 @@ MSG_DEF(JSMSG_ARRAY_COMP_LEFTSIDE,     0, JSEXN_SYNTAXERR, "invalid array compre
 MSG_DEF(JSMSG_ARRAY_INIT_TOO_BIG,      0, JSEXN_INTERNALERR, "array initializer too large")
 MSG_DEF(JSMSG_AS_AFTER_IMPORT_STAR,    0, JSEXN_SYNTAXERR, "missing keyword 'as' after import *")
 MSG_DEF(JSMSG_AS_AFTER_RESERVED_WORD,  1, JSEXN_SYNTAXERR, "missing keyword 'as' after reserved word '{0}'")
-MSG_DEF(JSMSG_ASYNC_GENERATOR,         0, JSEXN_SYNTAXERR, "generator function or method can't be async")
 MSG_DEF(JSMSG_AWAIT_IN_DEFAULT,        0, JSEXN_SYNTAXERR, "await can't be used in default expression")
 MSG_DEF(JSMSG_AWAIT_OUTSIDE_ASYNC,     0, JSEXN_SYNTAXERR, "await is only valid in async functions")
 MSG_DEF(JSMSG_BAD_ARROW_ARGS,          0, JSEXN_SYNTAXERR, "invalid arrow-function arguments (parentheses around the arrow-function may help)")
-- 
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