Status: Untriaged
Owner: ----
New issue 4103 by [email protected]: v8::Array::CloneElementAt returns
empty result on cloning
https://code.google.com/p/v8/issues/detail?id=4103
Version: 19a421c694d2aaa6314dd19d25b55de4507bb56d
OS: Linux (Ubuntu 14.04.2 LTS)
Architecture: x64
What steps will reproduce the problem?
1. Create v8::Local<v8::Array> and add at least one v8::Local<v8::Object>
to it.
2. Try to call v8::Array::CloneElementAt(context, index)
3. Check whether result IsEmpty().
What is the expected output?
Cloned v8::MaybeLocal<v8::Object> is not empty.
What do you see instead?
Cloned v8::MaybeLocal<v8::Object> is empty.
here is brief explanation:
v8::Local<v8::Array> local_array = v8::Array::New(isolate);
local_array->Set(context, 0, v8::Object::New(isolate).As<v8::Value>());
if (!local_array->Get(0)->IsObject()) {
printf("Try to clone something diffrent from object");
}
v8::MaybeLocal<v8::Object> maybe_local_object =
local_array->CloneElementAt(local_context, 0);
if (maybe_local_object.IsEmpty()) {
printf("Cloning failed\n");
return;
}
After tweaking Array::CloneElementAt source code from
has_pending_exception = ToLocal<Object>(
isolate->factory()->CopyJSObject(paragon_handle), &result);
to
ToLocal<Object>(
isolate->factory()->CopyJSObject(paragon_handle), &result);
(which is a dumb way actually)
cloning works without any visible side-effects.
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