- Annotate instructions that load objects from the ObjectPool or Thread.

runtime/vm/json_stream.cc

Index: runtime/vm/json_stream.cc
diff --git a/runtime/vm/json_stream.cc b/runtime/vm/json_stream.cc
index dd2a04c8b42852697353034de0a2ed2299c29752..9f942053c99ed197c36a59a3a9371438e0cae18a 100644
--- a/runtime/vm/json_stream.cc
+++ b/runtime/vm/json_stream.cc
@@ -310,6 +310,11 @@ void JSONStream::CloseArray() {
 }
 
 
+void JSONStream::PrintValueNull() {
+  PrintCommaIfNeeded();
+  buffer_.Printf("null");
+}
+
 void JSONStream::PrintValueBool(bool b) {
   PrintCommaIfNeeded();
   buffer_.Printf("%s", b ? "true" : "false");