Check that after a weak callback, the handle is either dead or strong

src/global-handles.cc

Index: src/global-handles.cc
diff --git a/src/global-handles.cc b/src/global-handles.cc
index 09449791f4f2352411c31e1ad5f82caaa692a1d7..211bb1c77486bafd754a91854dabbf95355c8e14 100644
--- a/src/global-handles.cc
+++ b/src/global-handles.cc
@@ -271,7 +271,7 @@ class GlobalHandles::Node {
     }
     // Absence of explicit cleanup or revival of weak handle
     // in most of the cases would lead to memory leak.
-    ASSERT(state() != NEAR_DEATH);
+    CHECK(state() != NEAR_DEATH);
     return true;
   }