diff --git a/deps/v8/include/v8-version.h b/deps/v8/include/v8-version.h
index cde8bf192dd6fc..c24f07202b0847 100644
--- a/deps/v8/include/v8-version.h
+++ b/deps/v8/include/v8-version.h
@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 5
 #define V8_MINOR_VERSION 0
 #define V8_BUILD_NUMBER 71
-#define V8_PATCH_LEVEL 47
+#define V8_PATCH_LEVEL 52
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)
diff --git a/deps/v8/src/compiler/js-create-lowering.cc b/deps/v8/src/compiler/js-create-lowering.cc
index df5c8d07df1fda..20033636edc186 100644
--- a/deps/v8/src/compiler/js-create-lowering.cc
+++ b/deps/v8/src/compiler/js-create-lowering.cc
@@ -905,8 +905,17 @@ Node* JSCreateLowering::AllocateFastLiteral(
         site_context->ExitScope(current_site, boilerplate_object);
       } else if (property_details.representation().IsDouble()) {
         // Allocate a mutable HeapNumber box and store the value into it.
-        value = effect = AllocateMutableHeapNumber(
-            Handle<HeapNumber>::cast(boilerplate_value)->value(),
+        Callable callable = CodeFactory::AllocateMutableHeapNumber(isolate());
+        CallDescriptor* desc = Linkage::GetStubCallDescriptor(
+            isolate(), jsgraph()->zone(), callable.descriptor(), 0,
+            CallDescriptor::kNoFlags, Operator::kNoThrow);
+        value = effect = graph()->NewNode(
+            common()->Call(desc), jsgraph()->HeapConstant(callable.code()),
+            jsgraph()->NoContextConstant(), effect, control);
+        effect = graph()->NewNode(
+            simplified()->StoreField(AccessBuilder::ForHeapNumberValue()),
+            value, jsgraph()->Constant(
+                       Handle<HeapNumber>::cast(boilerplate_value)->value()),
             effect, control);
       } else if (property_details.representation().IsSmi()) {
         // Ensure that value is stored as smi.
@@ -1028,23 +1037,6 @@ Node* JSCreateLowering::AllocateFastLiteralElements(
   return builder.Finish();
 }
 
-Node* JSCreateLowering::AllocateMutableHeapNumber(double value, Node* effect,
-                                                  Node* control) {
-  // TODO(turbofan): Support inline allocation of MutableHeapNumber
-  // (requires proper alignment on Allocate, and Begin/FinishRegion).
-  Callable callable = CodeFactory::AllocateMutableHeapNumber(isolate());
-  CallDescriptor* desc = Linkage::GetStubCallDescriptor(
-      isolate(), jsgraph()->zone(), callable.descriptor(), 0,
-      CallDescriptor::kNoFlags, Operator::kNoThrow);
-  Node* result = effect = graph()->NewNode(
-      common()->Call(desc), jsgraph()->HeapConstant(callable.code()),
-      jsgraph()->NoContextConstant(), effect, control);
-  effect = graph()->NewNode(
-      simplified()->StoreField(AccessBuilder::ForHeapNumberValue()), result,
-      jsgraph()->Constant(value), effect, control);
-  return result;
-}
-
 MaybeHandle<LiteralsArray> JSCreateLowering::GetSpecializationLiterals(
     Node* node) {
   Node* const closure = NodeProperties::GetValueInput(node, 0);
diff --git a/deps/v8/src/compiler/js-create-lowering.h b/deps/v8/src/compiler/js-create-lowering.h
index d9d184b8e2981a..52e7ec254ad230 100644
--- a/deps/v8/src/compiler/js-create-lowering.h
+++ b/deps/v8/src/compiler/js-create-lowering.h
@@ -70,7 +70,6 @@ class JSCreateLowering final : public AdvancedReducer {
                                     Handle<JSObject> boilerplate,
                                     PretenureFlag pretenure,
                                     AllocationSiteUsageContext* site_context);
-  Node* AllocateMutableHeapNumber(double value, Node* effect, Node* control);
 
   // Infers the LiteralsArray to use for a given {node}.
   MaybeHandle<LiteralsArray> GetSpecializationLiterals(Node* node);
diff --git a/deps/v8/src/crankshaft/arm/lithium-codegen-arm.cc b/deps/v8/src/crankshaft/arm/lithium-codegen-arm.cc
index 7b2ebadf1f693d..8b4e6c99049912 100644
--- a/deps/v8/src/crankshaft/arm/lithium-codegen-arm.cc
+++ b/deps/v8/src/crankshaft/arm/lithium-codegen-arm.cc
@@ -2443,11 +2443,12 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
   __ JumpIfSmi(input, is_false);
 
-  __ CompareObjectType(input, temp, temp2, JS_FUNCTION_TYPE);
+  __ CompareObjectType(input, temp, temp2, FIRST_FUNCTION_TYPE);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
   if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
-    __ b(eq, is_true);
+    __ b(hs, is_true);
   } else {
-    __ b(eq, is_false);
+    __ b(hs, is_false);
   }
 
   // Check if the constructor in the map is a function.
diff --git a/deps/v8/src/crankshaft/arm64/lithium-codegen-arm64.cc b/deps/v8/src/crankshaft/arm64/lithium-codegen-arm64.cc
index 6399a8bb09abb7..855cac14c044bb 100644
--- a/deps/v8/src/crankshaft/arm64/lithium-codegen-arm64.cc
+++ b/deps/v8/src/crankshaft/arm64/lithium-codegen-arm64.cc
@@ -2225,11 +2225,12 @@ void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
   __ JumpIfSmi(input, false_label);
 
   Register map = scratch2;
-  __ CompareObjectType(input, map, scratch1, JS_FUNCTION_TYPE);
+  __ CompareObjectType(input, map, scratch1, FIRST_FUNCTION_TYPE);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
   if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
-    __ B(eq, true_label);
+    __ B(hs, true_label);
   } else {
-    __ B(eq, false_label);
+    __ B(hs, false_label);
   }
 
   // Check if the constructor in the map is a function.
diff --git a/deps/v8/src/crankshaft/ia32/lithium-codegen-ia32.cc b/deps/v8/src/crankshaft/ia32/lithium-codegen-ia32.cc
index a535153e18df6d..239db8ba13e2e5 100644
--- a/deps/v8/src/crankshaft/ia32/lithium-codegen-ia32.cc
+++ b/deps/v8/src/crankshaft/ia32/lithium-codegen-ia32.cc
@@ -2342,11 +2342,12 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
   DCHECK(!temp.is(temp2));
   __ JumpIfSmi(input, is_false);
 
-  __ CmpObjectType(input, JS_FUNCTION_TYPE, temp);
+  __ CmpObjectType(input, FIRST_FUNCTION_TYPE, temp);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
   if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
-    __ j(equal, is_true);
+    __ j(above_equal, is_true);
   } else {
-    __ j(equal, is_false);
+    __ j(above_equal, is_false);
   }
 
   // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range.
diff --git a/deps/v8/src/crankshaft/mips/lithium-codegen-mips.cc b/deps/v8/src/crankshaft/mips/lithium-codegen-mips.cc
index 8febb573b179cc..66fcf75ec0e300 100644
--- a/deps/v8/src/crankshaft/mips/lithium-codegen-mips.cc
+++ b/deps/v8/src/crankshaft/mips/lithium-codegen-mips.cc
@@ -2355,10 +2355,11 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
   __ JumpIfSmi(input, is_false);
   __ GetObjectType(input, temp, temp2);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
   if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
-    __ Branch(is_true, eq, temp2, Operand(JS_FUNCTION_TYPE));
+    __ Branch(is_true, hs, temp2, Operand(FIRST_FUNCTION_TYPE));
   } else {
-    __ Branch(is_false, eq, temp2, Operand(JS_FUNCTION_TYPE));
+    __ Branch(is_false, hs, temp2, Operand(FIRST_FUNCTION_TYPE));
   }
 
   // Check if the constructor in the map is a function.
diff --git a/deps/v8/src/crankshaft/mips64/lithium-codegen-mips64.cc b/deps/v8/src/crankshaft/mips64/lithium-codegen-mips64.cc
index ddf908d9edf58f..5937f973867280 100644
--- a/deps/v8/src/crankshaft/mips64/lithium-codegen-mips64.cc
+++ b/deps/v8/src/crankshaft/mips64/lithium-codegen-mips64.cc
@@ -2473,10 +2473,11 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
   __ JumpIfSmi(input, is_false);
 
   __ GetObjectType(input, temp, temp2);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
   if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
-    __ Branch(is_true, eq, temp2, Operand(JS_FUNCTION_TYPE));
+    __ Branch(is_true, hs, temp2, Operand(FIRST_FUNCTION_TYPE));
   } else {
-    __ Branch(is_false, eq, temp2, Operand(JS_FUNCTION_TYPE));
+    __ Branch(is_false, hs, temp2, Operand(FIRST_FUNCTION_TYPE));
   }
 
   // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range.
diff --git a/deps/v8/src/crankshaft/ppc/lithium-codegen-ppc.cc b/deps/v8/src/crankshaft/ppc/lithium-codegen-ppc.cc
index 921d9b69eb3021..9cf1db64bcd10e 100644
--- a/deps/v8/src/crankshaft/ppc/lithium-codegen-ppc.cc
+++ b/deps/v8/src/crankshaft/ppc/lithium-codegen-ppc.cc
@@ -2498,11 +2498,12 @@ void LCodeGen::EmitClassOfTest(Label* is_true, Label* is_false,
 
   __ JumpIfSmi(input, is_false);
 
-  __ CompareObjectType(input, temp, temp2, JS_FUNCTION_TYPE);
+  __ CompareObjectType(input, temp, temp2, FIRST_FUNCTION_TYPE);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
   if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
-    __ beq(is_true);
+    __ bge(is_true);
   } else {
-    __ beq(is_false);
+    __ bge(is_false);
   }
 
   // Check if the constructor in the map is a function.
diff --git a/deps/v8/src/crankshaft/x64/lithium-codegen-x64.cc b/deps/v8/src/crankshaft/x64/lithium-codegen-x64.cc
index 849b4b33c699d5..31ff12537e6bf9 100644
--- a/deps/v8/src/crankshaft/x64/lithium-codegen-x64.cc
+++ b/deps/v8/src/crankshaft/x64/lithium-codegen-x64.cc
@@ -2393,11 +2393,12 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
   __ JumpIfSmi(input, is_false);
 
-  __ CmpObjectType(input, JS_FUNCTION_TYPE, temp);
+  __ CmpObjectType(input, FIRST_FUNCTION_TYPE, temp);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
   if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
-    __ j(equal, is_true);
+    __ j(above_equal, is_true);
   } else {
-    __ j(equal, is_false);
+    __ j(above_equal, is_false);
   }
 
   // Check if the constructor in the map is a function.
diff --git a/deps/v8/src/crankshaft/x87/lithium-codegen-x87.cc b/deps/v8/src/crankshaft/x87/lithium-codegen-x87.cc
index a8f22be732521e..f80e0768a68475 100644
--- a/deps/v8/src/crankshaft/x87/lithium-codegen-x87.cc
+++ b/deps/v8/src/crankshaft/x87/lithium-codegen-x87.cc
@@ -2629,11 +2629,12 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
   DCHECK(!temp.is(temp2));
   __ JumpIfSmi(input, is_false);
 
-  __ CmpObjectType(input, JS_FUNCTION_TYPE, temp);
+  __ CmpObjectType(input, FIRST_FUNCTION_TYPE, temp);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
   if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
-    __ j(equal, is_true);
+    __ j(above_equal, is_true);
   } else {
-    __ j(equal, is_false);
+    __ j(above_equal, is_false);
   }
 
   // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range.
diff --git a/deps/v8/src/full-codegen/arm/full-codegen-arm.cc b/deps/v8/src/full-codegen/arm/full-codegen-arm.cc
index 6e6a65511a4e73..46e3e2cc7156ec 100644
--- a/deps/v8/src/full-codegen/arm/full-codegen-arm.cc
+++ b/deps/v8/src/full-codegen/arm/full-codegen-arm.cc
@@ -3075,9 +3075,10 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
   // Map is now in r0.
   __ b(lt, &null);
 
-  // Return 'Function' for JSFunction objects.
-  __ cmp(r1, Operand(JS_FUNCTION_TYPE));
-  __ b(eq, &function);
+  // Return 'Function' for JSFunction and JSBoundFunction objects.
+  __ cmp(r1, Operand(FIRST_FUNCTION_TYPE));
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
+  __ b(hs, &function);
 
   // Check if the constructor in the map is a JS function.
   Register instance_type = r2;
diff --git a/deps/v8/src/full-codegen/arm64/full-codegen-arm64.cc b/deps/v8/src/full-codegen/arm64/full-codegen-arm64.cc
index d0278e74219951..d43ae754e98a75 100644
--- a/deps/v8/src/full-codegen/arm64/full-codegen-arm64.cc
+++ b/deps/v8/src/full-codegen/arm64/full-codegen-arm64.cc
@@ -2863,8 +2863,9 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
   __ B(lt, &null);
 
   // Return 'Function' for JSFunction objects.
-  __ Cmp(x11, JS_FUNCTION_TYPE);
-  __ B(eq, &function);
+  __ Cmp(x11, FIRST_FUNCTION_TYPE);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
+  __ B(hs, &function);
 
   // Check if the constructor in the map is a JS function.
   Register instance_type = x14;
diff --git a/deps/v8/src/full-codegen/ia32/full-codegen-ia32.cc b/deps/v8/src/full-codegen/ia32/full-codegen-ia32.cc
index fadcd7cb5dc919..3dc5da12c6b18e 100644
--- a/deps/v8/src/full-codegen/ia32/full-codegen-ia32.cc
+++ b/deps/v8/src/full-codegen/ia32/full-codegen-ia32.cc
@@ -2953,9 +2953,10 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
   __ CmpObjectType(eax, FIRST_JS_RECEIVER_TYPE, eax);
   __ j(below, &null, Label::kNear);
 
-  // Return 'Function' for JSFunction objects.
-  __ CmpInstanceType(eax, JS_FUNCTION_TYPE);
-  __ j(equal, &function, Label::kNear);
+  // Return 'Function' for JSFunction and JSBoundFunction objects.
+  __ CmpInstanceType(eax, FIRST_FUNCTION_TYPE);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
+  __ j(above_equal, &function, Label::kNear);
 
   // Check if the constructor in the map is a JS function.
   __ GetMapConstructor(eax, eax, ebx);
diff --git a/deps/v8/src/full-codegen/mips/full-codegen-mips.cc b/deps/v8/src/full-codegen/mips/full-codegen-mips.cc
index c8ce2045906931..3b34cb3a98e9e5 100644
--- a/deps/v8/src/full-codegen/mips/full-codegen-mips.cc
+++ b/deps/v8/src/full-codegen/mips/full-codegen-mips.cc
@@ -3073,8 +3073,9 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
   __ GetObjectType(v0, v0, a1);  // Map is now in v0.
   __ Branch(&null, lt, a1, Operand(FIRST_JS_RECEIVER_TYPE));
 
-  // Return 'Function' for JSFunction objects.
-  __ Branch(&function, eq, a1, Operand(JS_FUNCTION_TYPE));
+  // Return 'Function' for JSFunction and JSBoundFunction objects.
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
+  __ Branch(&function, hs, a1, Operand(FIRST_FUNCTION_TYPE));
 
   // Check if the constructor in the map is a JS function.
   Register instance_type = a2;
diff --git a/deps/v8/src/full-codegen/mips64/full-codegen-mips64.cc b/deps/v8/src/full-codegen/mips64/full-codegen-mips64.cc
index c85dee464453c8..9573be297a83c1 100644
--- a/deps/v8/src/full-codegen/mips64/full-codegen-mips64.cc
+++ b/deps/v8/src/full-codegen/mips64/full-codegen-mips64.cc
@@ -3077,8 +3077,9 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
   __ GetObjectType(v0, v0, a1);  // Map is now in v0.
   __ Branch(&null, lt, a1, Operand(FIRST_JS_RECEIVER_TYPE));
 
-  // Return 'Function' for JSFunction objects.
-  __ Branch(&function, eq, a1, Operand(JS_FUNCTION_TYPE));
+  // Return 'Function' for JSFunction and JSBoundFunction objects.
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
+  __ Branch(&function, hs, a1, Operand(FIRST_FUNCTION_TYPE));
 
   // Check if the constructor in the map is a JS function.
   Register instance_type = a2;
diff --git a/deps/v8/src/full-codegen/ppc/full-codegen-ppc.cc b/deps/v8/src/full-codegen/ppc/full-codegen-ppc.cc
index 24a2a387331f49..daf3dbc0999b8b 100644
--- a/deps/v8/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/deps/v8/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -3077,9 +3077,10 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
   // Map is now in r3.
   __ blt(&null);
 
-  // Return 'Function' for JSFunction objects.
-  __ cmpi(r4, Operand(JS_FUNCTION_TYPE));
-  __ beq(&function);
+  // Return 'Function' for JSFunction and JSBoundFunction objects.
+  __ cmpli(r4, Operand(FIRST_FUNCTION_TYPE));
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
+  __ bge(&function);
 
   // Check if the constructor in the map is a JS function.
   Register instance_type = r5;
diff --git a/deps/v8/src/full-codegen/x64/full-codegen-x64.cc b/deps/v8/src/full-codegen/x64/full-codegen-x64.cc
index 910b2cf9f062b5..2f7788d0c74fc6 100644
--- a/deps/v8/src/full-codegen/x64/full-codegen-x64.cc
+++ b/deps/v8/src/full-codegen/x64/full-codegen-x64.cc
@@ -2944,9 +2944,10 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
   __ CmpObjectType(rax, FIRST_JS_RECEIVER_TYPE, rax);
   __ j(below, &null, Label::kNear);
 
-  // Return 'Function' for JSFunction objects.
-  __ CmpInstanceType(rax, JS_FUNCTION_TYPE);
-  __ j(equal, &function, Label::kNear);
+  // Return 'Function' for JSFunction and JSBoundFunction objects.
+  __ CmpInstanceType(rax, FIRST_FUNCTION_TYPE);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
+  __ j(above_equal, &function, Label::kNear);
 
   // Check if the constructor in the map is a JS function.
   __ GetMapConstructor(rax, rax, rbx);
diff --git a/deps/v8/src/full-codegen/x87/full-codegen-x87.cc b/deps/v8/src/full-codegen/x87/full-codegen-x87.cc
index 36b7c5d63687eb..1fecf499a661e1 100644
--- a/deps/v8/src/full-codegen/x87/full-codegen-x87.cc
+++ b/deps/v8/src/full-codegen/x87/full-codegen-x87.cc
@@ -2945,9 +2945,10 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
   __ CmpObjectType(eax, FIRST_JS_RECEIVER_TYPE, eax);
   __ j(below, &null, Label::kNear);
 
-  // Return 'Function' for JSFunction objects.
-  __ CmpInstanceType(eax, JS_FUNCTION_TYPE);
-  __ j(equal, &function, Label::kNear);
+  // Return 'Function' for JSFunction and JSBoundFunction objects.
+  __ CmpInstanceType(eax, FIRST_FUNCTION_TYPE);
+  STATIC_ASSERT(LAST_FUNCTION_TYPE == LAST_TYPE);
+  __ j(above_equal, &function, Label::kNear);
 
   // Check if the constructor in the map is a JS function.
   __ GetMapConstructor(eax, eax, ebx);
diff --git a/deps/v8/src/objects.cc b/deps/v8/src/objects.cc
index f577d5e4d3ec4d..cc0712a324804a 100644
--- a/deps/v8/src/objects.cc
+++ b/deps/v8/src/objects.cc
@@ -714,9 +714,14 @@ MaybeHandle<Object> Object::GetProperty(LookupIterator* it) {
       case LookupIterator::NOT_FOUND:
       case LookupIterator::TRANSITION:
         UNREACHABLE();
-      case LookupIterator::JSPROXY:
-        return JSProxy::GetProperty(it->isolate(), it->GetHolder<JSProxy>(),
-                                    it->GetName(), it->GetReceiver());
+      case LookupIterator::JSPROXY: {
+        bool was_found;
+        MaybeHandle<Object> result =
+            JSProxy::GetProperty(it->isolate(), it->GetHolder<JSProxy>(),
+                                 it->GetName(), it->GetReceiver(), &was_found);
+        if (!was_found) it->NotFound();
+        return result;
+      }
       case LookupIterator::INTERCEPTOR: {
         bool done;
         Handle<Object> result;
@@ -756,7 +761,9 @@ MaybeHandle<Object> Object::GetProperty(LookupIterator* it) {
 MaybeHandle<Object> JSProxy::GetProperty(Isolate* isolate,
                                          Handle<JSProxy> proxy,
                                          Handle<Name> name,
-                                         Handle<Object> receiver) {
+                                         Handle<Object> receiver,
+                                         bool* was_found) {
+  *was_found = true;
   if (receiver->IsJSGlobalObject()) {
     THROW_NEW_ERROR(
         isolate,
@@ -789,7 +796,9 @@ MaybeHandle<Object> JSProxy::GetProperty(Isolate* isolate,
     // 7.a Return target.[[Get]](P, Receiver).
     LookupIterator it =
         LookupIterator::PropertyOrElement(isolate, receiver, name, target);
-    return Object::GetProperty(&it);
+    MaybeHandle<Object> result = Object::GetProperty(&it);
+    *was_found = it.IsFound();
+    return result;
   }
   // 8. Let trapResult be ? Call(trap, handler, «target, P, Receiver»).
   Handle<Object> trap_result;
@@ -13345,6 +13354,18 @@ Handle<String> JSBoundFunction::ToString(Handle<JSBoundFunction> function) {
   return isolate->factory()->NewStringFromAsciiChecked(kNativeCodeSource);
 }
 
+// static
+MaybeHandle<String> JSBoundFunction::GetName(Isolate* isolate,
+                                             Handle<JSBoundFunction> function) {
+  Handle<String> prefix = isolate->factory()->bound__string();
+  if (!function->bound_target_function()->IsJSFunction()) return prefix;
+  Handle<JSFunction> target(JSFunction::cast(function->bound_target_function()),
+                            isolate);
+  Handle<Object> target_name = JSFunction::GetName(target);
+  if (!target_name->IsString()) return prefix;
+  Factory* factory = isolate->factory();
+  return factory->NewConsString(prefix, Handle<String>::cast(target_name));
+}
 
 // static
 Handle<String> JSFunction::ToString(Handle<JSFunction> function) {
diff --git a/deps/v8/src/objects.h b/deps/v8/src/objects.h
index 61c6e5ebe1fab6..f5e35c359674b0 100644
--- a/deps/v8/src/objects.h
+++ b/deps/v8/src/objects.h
@@ -7394,6 +7394,9 @@ class JSBoundFunction : public JSObject {
   // to ES6 section 19.2.3.5 Function.prototype.toString ( ).
   static Handle<String> ToString(Handle<JSBoundFunction> function);
 
+  static MaybeHandle<String> GetName(Isolate* isolate,
+                                     Handle<JSBoundFunction> function);
+
   // Layout description.
   static const int kBoundTargetFunctionOffset = JSObject::kHeaderSize;
   static const int kBoundThisOffset = kBoundTargetFunctionOffset + kPointerSize;
@@ -9731,7 +9734,7 @@ class JSProxy: public JSReceiver {
   // ES6 9.5.8
   MUST_USE_RESULT static MaybeHandle<Object> GetProperty(
       Isolate* isolate, Handle<JSProxy> proxy, Handle<Name> name,
-      Handle<Object> receiver);
+      Handle<Object> receiver, bool* was_found);
 
   // ES6 9.5.9
   MUST_USE_RESULT static Maybe<bool> SetProperty(Handle<JSProxy> proxy,
diff --git a/deps/v8/src/parsing/parser.cc b/deps/v8/src/parsing/parser.cc
index 8005479a32670b..968e8ed4ff5ef8 100644
--- a/deps/v8/src/parsing/parser.cc
+++ b/deps/v8/src/parsing/parser.cc
@@ -4536,7 +4536,7 @@ class InitializerRewriter : public AstExpressionVisitor {
         scope_(scope) {}
 
  private:
-  void VisitExpression(Expression* expr) {
+  void VisitExpression(Expression* expr) override {
     RewritableExpression* to_rewrite = expr->AsRewritableExpression();
     if (to_rewrite == nullptr || to_rewrite->is_rewritten()) return;
 
@@ -4544,6 +4544,10 @@ class InitializerRewriter : public AstExpressionVisitor {
                                                             scope_);
   }
 
+  // Code in function literals does not need to be eagerly rewritten, it will be
+  // rewritten when scheduled.
+  void VisitFunctionLiteral(FunctionLiteral* expr) override {}
+
  private:
   Parser* parser_;
   Scope* scope_;
diff --git a/deps/v8/src/runtime/runtime-function.cc b/deps/v8/src/runtime/runtime-function.cc
index d424a9ebfeb262..47a21f8f9bfbe8 100644
--- a/deps/v8/src/runtime/runtime-function.cc
+++ b/deps/v8/src/runtime/runtime-function.cc
@@ -16,11 +16,20 @@ namespace v8 {
 namespace internal {
 
 RUNTIME_FUNCTION(Runtime_FunctionGetName) {
-  SealHandleScope shs(isolate);
+  HandleScope scope(isolate);
   DCHECK(args.length() == 1);
 
-  CONVERT_ARG_CHECKED(JSFunction, f, 0);
-  return f->shared()->name();
+  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, function, 0);
+  if (function->IsJSBoundFunction()) {
+  Handle<Object> result;
+    ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+        isolate, result, JSBoundFunction::GetName(
+                             isolate, Handle<JSBoundFunction>::cast(function)));
+    return *result;
+  } else {
+    RUNTIME_ASSERT(function->IsJSFunction());
+    return Handle<JSFunction>::cast(function)->shared()->name();
+  }
 }
 
 
diff --git a/deps/v8/test/cctest/test-api.cc b/deps/v8/test/cctest/test-api.cc
index f4e8fe8e4bd36b..449d8dd66d0931 100644
--- a/deps/v8/test/cctest/test-api.cc
+++ b/deps/v8/test/cctest/test-api.cc
@@ -12898,6 +12898,19 @@ THREADED_TEST(VariousGetPropertiesAndThrowingCallbacks) {
   CHECK(try_catch.HasCaught());
   try_catch.Reset();
   CHECK(result.IsEmpty());
+
+  Local<Object> target = CompileRun("({})").As<Object>();
+  Local<Object> handler = CompileRun("({})").As<Object>();
+  Local<v8::Proxy> proxy =
+      v8::Proxy::New(context.local(), target, handler).ToLocalChecked();
+
+  result = target->GetRealNamedProperty(context.local(), v8_str("f"));
+  CHECK(!try_catch.HasCaught());
+  CHECK(result.IsEmpty());
+
+  result = proxy->GetRealNamedProperty(context.local(), v8_str("f"));
+  CHECK(!try_catch.HasCaught());
+  CHECK(result.IsEmpty());
 }
 
 
diff --git a/deps/v8/test/mjsunit/es6/regress/regress-594084.js b/deps/v8/test/mjsunit/es6/regress/regress-594084.js
new file mode 100644
index 00000000000000..4953cc9bb61cef
--- /dev/null
+++ b/deps/v8/test/mjsunit/es6/regress/regress-594084.js
@@ -0,0 +1,10 @@
+// Copyright 2016 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.
+//
+// Flags: --lazy --min-preparse-length=0
+(function() {
+  function CRASH(defaultParameter =
+      (function() { function functionDeclaration() { return 0; } }())) {
+  }
+})();
diff --git a/deps/v8/test/mjsunit/mirror-function.js b/deps/v8/test/mjsunit/mirror-function.js
index cda815df68d7d5..88106a2ed0fa68 100644
--- a/deps/v8/test/mjsunit/mirror-function.js
+++ b/deps/v8/test/mjsunit/mirror-function.js
@@ -88,3 +88,4 @@ function testFunctionMirror(f) {
 testFunctionMirror(function(){});
 testFunctionMirror(function a(){return 1;});
 testFunctionMirror(Math.sin);
+testFunctionMirror((function(){}).bind({}), "Object");
diff --git a/deps/v8/test/mjsunit/regress/regress-5010.js b/deps/v8/test/mjsunit/regress/regress-5010.js
new file mode 100644
index 00000000000000..ecd4026dd82665
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-5010.js
@@ -0,0 +1,9 @@
+// Copyright 2016 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.
+
+// Flags: --allow-natives-syntax
+
+var bound = (function(){}).bind({});
+assertEquals("Function", %_ClassOf(bound));
+assertEquals("Function", %ClassOf(bound));
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-610228.js b/deps/v8/test/mjsunit/regress/regress-crbug-610228.js
new file mode 100644
index 00000000000000..ca077d5631668b
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-610228.js
@@ -0,0 +1,11 @@
+// Copyright 2016 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.
+
+// Flags: --allow-natives-syntax
+
+function foo() { return JSON.stringify({a: 0.1}); }
+assertEquals('{"a":0.1}', foo());
+assertEquals('{"a":0.1}', foo());
+%OptimizeFunctionOnNextCall(foo);
+assertEquals('{"a":0.1}', foo());