Set the current context to the function's context when entering to LAP.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index a63255a931090e60b01e5caf48e2747cdc9a7c97..b2f614fd3fa65babd7f2bbe3c6d608f06c6c7843 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -1369,8 +1369,8 @@ MaybeHandle<Object> Object::GetPropertyWithAccessor(LookupIterator* it) {
   DCHECK(!structure->IsForeign());
 
   // API style callbacks.
+  Handle<JSObject> holder = it->GetHolder<JSObject>();
   if (structure->IsAccessorInfo()) {
-    Handle<JSObject> holder = it->GetHolder<JSObject>();
     Handle<Name> name = it->GetName();
     Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(structure);
     if (!info->IsCompatibleReceiver(*receiver)) {
@@ -1413,6 +1413,8 @@ MaybeHandle<Object> Object::GetPropertyWithAccessor(LookupIterator* it) {
   // Regular accessor.
   Handle<Object> getter(AccessorPair::cast(*structure)->getter(), isolate);
   if (getter->IsFunctionTemplateInfo()) {
+    SaveContext save(isolate);
+    isolate->set_context(*holder->GetCreationContext());
     return Builtins::InvokeApiFunction(
         isolate, false, Handle<FunctionTemplateInfo>::cast(getter), receiver, 0,
         nullptr, isolate->factory()->undefined_value());
@@ -1461,8 +1463,8 @@ Maybe<bool> Object::SetPropertyWithAccessor(LookupIterator* it,
   DCHECK(!structure->IsForeign());
 
   // API style callbacks.
+  Handle<JSObject> holder = it->GetHolder<JSObject>();
   if (structure->IsAccessorInfo()) {
-    Handle<JSObject> holder = it->GetHolder<JSObject>();
     Handle<Name> name = it->GetName();
     Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(structure);
     if (!info->IsCompatibleReceiver(*receiver)) {
@@ -1508,6 +1510,8 @@ Maybe<bool> Object::SetPropertyWithAccessor(LookupIterator* it,
   // Regular accessor.
   Handle<Object> setter(AccessorPair::cast(*structure)->setter(), isolate);
   if (setter->IsFunctionTemplateInfo()) {
+    SaveContext save(isolate);
+    isolate->set_context(*holder->GetCreationContext());
     Handle<Object> argv[] = {value};
     RETURN_ON_EXCEPTION_VALUE(
         isolate, Builtins::InvokeApiFunction(