TestFramework: also output failed request

test/RPCSession.cpp

@@ -351,7 +351,12 @@ Json::Value RPCSession::rpcCall(string const& _methodName, vector<string> const&
 	}
 
 	if (!result.isMember("result") || result["result"].isNull())
-		BOOST_FAIL("Missing result for JSON-RPC call: " + result.toStyledString());
+		BOOST_FAIL(
+			"Missing result for JSON-RPC call: " +
+			result.toStyledString() +
+			"\nRequest was " +
+			request
+		);
 
 	return result["result"];
 }