[destructuring] don't attempt to visit contents of FunctionLiterals

src/ast/ast-expression-visitor.cc

 // Copyright 2015 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.
 
 #include "src/v8.h"
 
 #include "src/ast/ast-expression-visitor.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
@@ skipping 13 matching lines @@
 
 #define RECURSE_EXPRESSION(call)    \
   do {                              \
     DCHECK(!HasStackOverflow());    \
     ++depth_;                       \
     call;                           \
     --depth_;                       \
     if (HasStackOverflow()) return; \
   } while (false)
 
-
-AstExpressionVisitor::AstExpressionVisitor(Isolate* isolate, Expression* root)
-    : root_(root), depth_(0) {
+AstExpressionVisitor::AstExpressionVisitor(Isolate* isolate, Expression* root,
+                                           Mode mode)
+    : root_(root), depth_(0), mode_(mode) {
   InitializeAstVisitor(isolate);
 }
 
-
 AstExpressionVisitor::AstExpressionVisitor(uintptr_t stack_limit,
-                                           Expression* root)
-    : root_(root), depth_(0) {
+                                           Expression* root, Mode mode)
+    : root_(root), depth_(0), mode_(mode) {
   InitializeAstVisitor(stack_limit);
 }
 
 
 void AstExpressionVisitor::Run() { RECURSE(Visit(root_)); }
 
 
 void AstExpressionVisitor::VisitVariableDeclaration(VariableDeclaration* decl) {
 }
 
@@ skipping 137 matching lines @@
   RECURSE(Visit(stmt->finally_block()));
 }
 
 
 void AstExpressionVisitor::VisitDebuggerStatement(DebuggerStatement* stmt) {}
 
 
 void AstExpressionVisitor::VisitFunctionLiteral(FunctionLiteral* expr) {
   Scope* scope = expr->scope();
   VisitExpression(expr);
+  if (is_shallow()) return;
   RECURSE_EXPRESSION(VisitDeclarations(scope->declarations()));
   RECURSE_EXPRESSION(VisitStatements(expr->body()));
 }
 
 
 void AstExpressionVisitor::VisitNativeFunctionLiteral(
     NativeFunctionLiteral* expr) {}
 
 
 void AstExpressionVisitor::VisitDoExpression(DoExpression* expr) {
@@ skipping 191 matching lines @@
 
 void AstExpressionVisitor::VisitRewritableExpression(
     RewritableExpression* expr) {
   VisitExpression(expr);
   RECURSE(Visit(expr->expression()));
 }
 
 
 }  // namespace internal
 }  // namespace v8