tor-browser

commit 5359b2e95b1d57f542aa9ee98ec76182fea4243f
parent 6985ed7b2bc849460ff5d99ff3e6633aaf7f9eae
Author: Debadree Chatterjee <debadree333@gmail.com>
Date:   Fri, 14 Nov 2025 18:29:44 +0000

Bug 2000160: Disallow using statements on eval toplevel. r=arai

Differential Revision: https://phabricator.services.mozilla.com/D272609

Diffstat:
M
js/src/frontend/ParseContext.h
 | 
9
++++++---
M
js/src/tests/jstests.list
 | 
1
-

2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/js/src/frontend/ParseContext.h b/js/src/frontend/ParseContext.h
@@ -599,9 +599,12 @@ class MOZ_STACK_CLASS ParseContext : public Nestable<ParseContext> {
 
 #ifdef ENABLE_EXPLICIT_RESOURCE_MANAGEMENT
   bool isUsingSyntaxAllowed() {
-    bool isInSwitch = innermostStatement() &&
-                      innermostStatement()->kind() == StatementKind::Switch;
-    return (!atGlobalLevel() || atModuleTopLevel()) && !isInSwitch;
+    if (innermostStatement() &&
+        innermostStatement()->kind() == StatementKind::Switch) {
+      return false;
+    }
+
+    return innermostStatement_ || sc_->isFunction() || sc_->isModule();
   }
 #endif
 
diff --git a/js/src/tests/jstests.list b/js/src/tests/jstests.list
@@ -707,7 +707,6 @@ skip script test262/language/statements/await-using/syntax/await-using-invalid-a
 skip script test262/language/statements/using/syntax/using-invalid-assignment-statement-body-for-of.js
 skip script test262/language/statements/using/syntax/with-initializer-default-statement-list.js
 skip script test262/language/statements/using/syntax/using-invalid-assignment-next-expression-for.js
-skip script test262/language/statements/using/syntax/using-not-allowed-at-top-level-of-eval.js
 skip script test262/language/statements/using/syntax/using-for-using-of-of.js