[ast] Remove internalization before AST rewriting

src/assert-scope.cc

Index: src/assert-scope.cc
diff --git a/src/assert-scope.cc b/src/assert-scope.cc
index 38527099667acc827a55f164af22ffda4d685307..aca7683c9ad4f344760099d68e0e2648c845f39a 100644
--- a/src/assert-scope.cc
+++ b/src/assert-scope.cc
@@ -83,15 +83,21 @@ PerThreadAssertScope<kType, kAllow>::PerThreadAssertScope()
 
 template <PerThreadAssertType kType, bool kAllow>
 PerThreadAssertScope<kType, kAllow>::~PerThreadAssertScope() {
+  if (data_ == nullptr) return;
+  Release();
+}
+
+template <PerThreadAssertType kType, bool kAllow>
+void PerThreadAssertScope<kType, kAllow>::Release() {
   DCHECK_NOT_NULL(data_);
   data_->Set(kType, old_state_);
   if (data_->DecrementLevel()) {
     PerThreadAssertData::SetCurrent(NULL);
     delete data_;
   }
+  data_ = nullptr;
 }
 
-
 // static
 template <PerThreadAssertType kType, bool kAllow>
 bool PerThreadAssertScope<kType, kAllow>::IsAllowed() {