Don't try to access error_code if application_data is null.

Author: jonsimantov

auth/src/desktop/rpcs/auth_response.cc

@@ -23,7 +23,7 @@ AuthError AuthResponse::error_code() const {
   if (IsSuccessful()) {
     return kAuthErrorNone;
   }
-  if (!application_data_->error) {
+  if (!application_data_ || !application_data_->error) {
     return kAuthErrorFailure;
   }
 

auth/src/desktop/rpcs/auth_response.h

@@ -40,8 +40,10 @@ class AuthResponse
   bool IsSuccessful() const;
 
   std::string error_message() const {
-    return application_data_->error ? application_data_->error->message
-                                    : std::string();
+    if (application_data_ && application_data_->error)
+      return application_data_->error->message;
+    else
+      return std::string();
   }
 };