message: Only show instruction label if stage is valid
diff: @@ -262,9 +262,13 @@ void ProcessorTab::enableSimulatorControls() {
  void ProcessorTab::updateInstructionLabels() {
  const auto& proc = ProcessorHandler::get()->getProcessor();
  - for (const auto& il : m_stageInstructionLabels) {
  - const QString instr = ProcessorHandler::get()->parseInstrAt(proc->getPcForStage(il.first));
  - il.second->setText(instr);
  + for (unsigned i = 0; i < proc->stageCount(); i++) {
  + const auto stageInfo = proc->stageInfo(i);
  + QString instrString;
  + if (stageInfo.pc_valid) {
  + instrString = ProcessorHandler::get()->parseInstrAt(stageInfo.pc);
  + }
  + m_stageInstructionLabels.at(i)->setText(instrString);
  }
  }
  