[#1950] Moved to += (vs =)

diff --git a/src/bin/d2/tests/configured_library.cc b/src/bin/d2/tests/configured_library.cc
index 6bf872f636db3c076ec1d205e858df5f2fe125a6..3aeb94d0866925992059878dc1ef6e08f745c740 100644 (file)
--- a/src/bin/d2/tests/configured_library.cc
+++ b/src/bin/d2/tests/configured_library.cc
@@ -32,7 +32,7 @@ d2_srv_configured(CalloutHandle& handle) {
         if (uc) {
             ConstElementPtr msg = uc->get("error");
             if (msg && (msg->getType() == Element::string)) {
-                error = msg->stringValue();
+                error += msg->stringValue();
             }
         }
     }