diff --git a/kdevplatform/language/duchain/navigation/abstractnavigationcontext.cpp b/kdevplatform/language/duchain/navigation/abstractnavigationcontext.cpp
--- a/kdevplatform/language/duchain/navigation/abstractnavigationcontext.cpp
+++ b/kdevplatform/language/duchain/navigation/abstractnavigationcontext.cpp
@@ -279,8 +279,10 @@
     Q_D(AbstractNavigationContext);
 
     //We create a navigation-widget here, and steal its context.. evil ;)
+    DUChainReadLocker lock;
     QScopedPointer<AbstractNavigationWidget> navigationWidget(
         declaration->context()->createNavigationWidget(declaration.data()));
+    lock.unlock();
     if (navigationWidget) {
         NavigationContextPointer ret = navigationWidget->context();
         ret->setPreviousContext(this);
diff --git a/kdevplatform/language/duchain/navigation/abstractnavigationwidget.cpp b/kdevplatform/language/duchain/navigation/abstractnavigationwidget.cpp
--- a/kdevplatform/language/duchain/navigation/abstractnavigationwidget.cpp
+++ b/kdevplatform/language/duchain/navigation/abstractnavigationwidget.cpp
@@ -278,8 +278,6 @@
 
 void AbstractNavigationWidgetPrivate::anchorClicked(const QUrl& url)
 {
-    DUChainReadLocker lock;
-
     //We may get deleted while the call to acceptLink, so make sure we don't crash in that case
     QPointer<AbstractNavigationWidget> thisPtr(q);
     NavigationContextPointer nextContext = m_context->acceptLink(url.toString());
diff --git a/plugins/contextbrowser/contextbrowser.cpp b/plugins/contextbrowser/contextbrowser.cpp
--- a/plugins/contextbrowser/contextbrowser.cpp
+++ b/plugins/contextbrowser/contextbrowser.cpp
@@ -795,14 +795,14 @@
     if (m_useDeclaration.data()) {
         foundDeclaration = m_useDeclaration.data();
     } else {
+        DUChainReadLocker lock;
         //If we haven't found a special language object, search for a use/declaration and eventually highlight it
         foundDeclaration =
             DUChainUtils::declarationForDefinition(DUChainUtils::itemUnderCursor(
                                                        view->document()->url(), position).declaration);
         if (foundDeclaration && foundDeclaration->kind() == Declaration::Alias) {
             auto* alias = dynamic_cast<AliasDeclaration*>(foundDeclaration);
             Q_ASSERT(alias);
-            DUChainReadLocker lock;
             foundDeclaration = alias->aliasedDeclaration().declaration();
         }
     }
@@ -1083,7 +1083,6 @@
             if (decl && decl->kind() == Declaration::Alias) {
                 auto* alias = dynamic_cast<AliasDeclaration*>(decl);
                 Q_ASSERT(alias);
-                DUChainReadLocker lock;
                 decl = alias->aliasedDeclaration().declaration();
             }