Fix 'eval' in class extends clauses to be always-strict

src/parsing/parser-base.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_PARSER_BASE_H
 #define V8_PARSING_PARSER_BASE_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/hashmap.h"
@@ skipping 895 matching lines @@
   bool IsValidPattern(ExpressionT expression) {
     return expression->IsObjectLiteral() || expression->IsArrayLiteral();
   }
 
   // Keep track of eval() calls since they disable all local variable
   // optimizations. This checks if expression is an eval call, and if yes,
   // forwards the information to scope.
   void CheckPossibleEvalCall(ExpressionT expression, Scope* scope) {
     if (Traits::IsIdentifier(expression) &&
         Traits::IsEval(Traits::AsIdentifier(expression))) {
-      scope->DeclarationScope()->RecordEvalCall();
       scope->RecordEvalCall();
+      if (is_sloppy(scope->language_mode())) {
+        // For sloppy scopes we also have to record the call at function level,
+        // in case it includes declarations that will be hoisted.
+        scope->DeclarationScope()->RecordEvalCall();
+      }
     }
   }
 
   // Used to validate property names in object literals and class literals
   enum PropertyKind {
     kAccessorProperty,
     kValueProperty,
     kMethodProperty
   };
 
@@ skipping 2283 matching lines @@
     has_seen_constructor_ = true;
     return;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_BASE_H