Do not use string_ref for output params.

It is very much unsafe to do so as the string_ref could point on a stack
variable of the callee.

1 files changed, 1 insertions, 1 deletions

diff --git a/include/grpc++/security/auth_metadata_processor.h b/include/grpc++/security/auth_metadata_processor.h
index 18ad922321..9b9c06e3b6 100644
--- a/include/grpc++/security/auth_metadata_processor.h
+++ b/include/grpc++/security/auth_metadata_processor.h
@@ -45,7 +45,7 @@ namespace grpc {
 class AuthMetadataProcessor {
  public:
   typedef std::multimap<grpc::string_ref, grpc::string_ref> InputMetadata;
-  typedef std::multimap<grpc::string, grpc::string_ref> OutputMetadata;
+  typedef std::multimap<grpc::string, grpc::string> OutputMetadata;
 
   virtual ~AuthMetadataProcessor() {}