- Turn on canonicalization verification after a reload in debug mode.

runtime/vm/isolate.cc

Index: runtime/vm/isolate.cc
diff --git a/runtime/vm/isolate.cc b/runtime/vm/isolate.cc
index bfc902e85776978b49e2a72929db3d9f3a2f5e5f..093e84d1a4d583f032f4cc79893f73aeacd5efdb 100644
--- a/runtime/vm/isolate.cc
+++ b/runtime/vm/isolate.cc
@@ -1122,16 +1122,6 @@ bool Isolate::ReloadSources(JSONStream* js,
   if (!dont_delete_reload_context) {
     DeleteReloadContext();
   }
-#if defined(DEBUG)
-  if (success) {
-    return success;
-    Thread* thread = Thread::Current();
-    Isolate* isolate = thread->isolate();
-    isolate->heap()->CollectAllGarbage();
-    VerifyCanonicalVisitor check_canonical(thread);
-    isolate->heap()->IterateObjects(&check_canonical);
-  }
-#endif  // DEBUG
   return success;
 }