diff --git a/launcher/tasks/Task.cpp b/launcher/tasks/Task.cpp
index 92b345c8d..d59660146 100644
--- a/launcher/tasks/Task.cpp
+++ b/launcher/tasks/Task.cpp
@@ -98,6 +98,7 @@ void Task::start()
         case State::Running: {
             if (m_show_debug)
                 qCWarning(taskLogC) << "The launcher tried to start task" << describe() << "while it was already running!";
+            Q_ASSERT(!isRunning());
             return;
         }
     }
@@ -112,6 +113,7 @@ void Task::emitFailed(QString reason)
     // Don't fail twice.
     if (!isRunning()) {
         qCCritical(taskLogC) << "Task" << describe() << "failed while not running!!!!: " << reason;
+        Q_ASSERT(!isRunning());
         return;
     }
     m_state = State::Failed;
@@ -126,6 +128,7 @@ void Task::emitAborted()
     // Don't abort twice.
     if (!isRunning()) {
         qCCritical(taskLogC) << "Task" << describe() << "aborted while not running!!!!";
+        Q_ASSERT(!isRunning());
         return;
     }
     m_state = State::AbortedByUser;
@@ -141,6 +144,7 @@ void Task::emitSucceeded()
     // Don't succeed twice.
     if (!isRunning()) {
         qCCritical(taskLogC) << "Task" << describe() << "succeeded while not running!!!!";
+        Q_ASSERT(!isRunning());
         return;
     }
     m_state = State::Succeeded;