Always update raw pointers when handling interrupts inside RegExp code.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 1cc7ac736d2275a33dece53ef51bbb77bcbad795..b4910684825a520bdc85358777435cb3d83b12f0 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -833,6 +833,12 @@ Object* Isolate::StackOverflow() {
   Throw(*exception, nullptr);
 
   CaptureAndSetSimpleStackTrace(exception, factory()->undefined_value());
+#ifdef VERIFY_HEAP
+  if (FLAG_verify_heap && FLAG_stress_compaction) {
+    heap()->CollectAllAvailableGarbage("trigger compaction");
+  }
+#endif  // VERIFY_HEAP
+
   return heap()->exception();
 }