From df52301a36c54d8a40dede0123b2cc4e5ac040e1 Mon Sep 17 00:00:00 2001
From: TianlinZhao <tianlinzhao@google.com>
Date: Wed, 29 Jul 2020 19:43:38 -0400
Subject: [PATCH] tracer workaround

---
 api/include/opentelemetry/trace/default_span.h | 3 ++-
 api/include/opentelemetry/trace/span.h         | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/api/include/opentelemetry/trace/default_span.h b/api/include/opentelemetry/trace/default_span.h
index f0c574243f..251c094bee 100644
--- a/api/include/opentelemetry/trace/default_span.h
+++ b/api/include/opentelemetry/trace/default_span.h
@@ -67,7 +67,8 @@ class DefaultSpan: public Span {
     DefaultSpan(DefaultSpan&& spn) : span_context_(spn.GetContext()) {}
     DefaultSpan(const DefaultSpan& spn) : span_context_(spn.GetContext()) {}
 
-    trace::Tracer &tracer() noexcept {
+    trace::Tracer &tracer() const noexcept {
+      trace::Tracer trace = trace::Tracer();
       return tracer_; // Invalid tracer
     }
 
diff --git a/api/include/opentelemetry/trace/span.h b/api/include/opentelemetry/trace/span.h
index ccd4d714ef..3a37e97ca5 100644
--- a/api/include/opentelemetry/trace/span.h
+++ b/api/include/opentelemetry/trace/span.h
@@ -154,7 +154,7 @@ class Span
   // AddEvent).
   virtual bool IsRecording() const noexcept = 0;
 
-  virtual trace::Tracer &tracer() noexcept = 0;
+  virtual trace::Tracer &tracer() const noexcept = 0;
 };
 }  // namespace trace
 OPENTELEMETRY_END_NAMESPACE