diff --git a/src/plugins/coreplugin/coreplugin.cpp b/src/plugins/coreplugin/coreplugin.cpp
index 65f6abe48d4..a8d1a4ee64b 100644
--- a/src/plugins/coreplugin/coreplugin.cpp
+++ b/src/plugins/coreplugin/coreplugin.cpp
@@ -144,12 +144,10 @@ bool CorePlugin::initialize(const QStringList &arguments, QString *errorMessage)
         m_mainWindow->setOverrideColor(args.overrideColor);
     m_locator = new Locator;
     qsrand(QDateTime::currentDateTime().toTime_t());
-    const bool success = m_mainWindow->init(errorMessage);
-    if (success) {
-        m_editMode = new EditMode;
-        ModeManager::activateMode(m_editMode->id());
-        InfoBar::initialize(ICore::settings(), creatorTheme());
-    }
+    m_mainWindow->init();
+    m_editMode = new EditMode;
+    ModeManager::activateMode(m_editMode->id());
+    InfoBar::initialize(ICore::settings(), creatorTheme());
 
     IWizardFactory::initialize();
 
@@ -204,7 +202,7 @@ bool CorePlugin::initialize(const QStringList &arguments, QString *errorMessage)
 
     Utils::PathChooser::setAboutToShowContextMenuHandler(&CorePlugin::addToPathChooserContextMenu);
 
-    return success;
+    return true;
 }
 
 void CorePlugin::extensionsInitialized()
diff --git a/src/plugins/coreplugin/mainwindow.cpp b/src/plugins/coreplugin/mainwindow.cpp
index e7fa756245a..9699b7a9669 100644
--- a/src/plugins/coreplugin/mainwindow.cpp
+++ b/src/plugins/coreplugin/mainwindow.cpp
@@ -288,13 +288,10 @@ MainWindow::~MainWindow()
     m_jsExpander = nullptr;
 }
 
-bool MainWindow::init(QString *errorMessage)
+void MainWindow::init()
 {
-    Q_UNUSED(errorMessage)
-
     m_progressManager->init(); // needs the status bar manager
     MessageManager::init();
-    return true;
 }
 
 void MainWindow::extensionsInitialized()
diff --git a/src/plugins/coreplugin/mainwindow.h b/src/plugins/coreplugin/mainwindow.h
index 52d46b092db..be3af9958b8 100644
--- a/src/plugins/coreplugin/mainwindow.h
+++ b/src/plugins/coreplugin/mainwindow.h
@@ -78,7 +78,7 @@ public:
     MainWindow();
     ~MainWindow();
 
-    bool init(QString *errorMessage);
+    void init();
     void extensionsInitialized();
     void aboutToShutdown();