Closes #16

tests/dbc_lifetime_test.cpp

@@ -175,6 +175,8 @@ void DbcLifetimeTest::duplicateKeys() {
     QVERIFY_THROWS_EXCEPTION(std::invalid_argument, (void) DecodeDatabase({frame, frame}));
     DecodeSignal signal;
     signal.name = "State";
+    signal.length = 1U;
+    frame.dlc = 1U;
     frame.signals = {signal, signal};
     QVERIFY_THROWS_EXCEPTION(std::invalid_argument, (void) DecodeDatabase({frame}));
     DbcDatabase parsed;