ExtensionSystem: fix crash on git interactive rebase

Luas LuaPluginSpec::plugin() returns a nullptr so we have to check the
usages of PluginSpec::plugin before using it.

Change-Id: If4fa926814e5a418e446d6970bb46060feec5664
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

1 files changed, 7 insertions, 5 deletions

diff --git a/src/libs/extensionsystem/pluginmanager.cpp b/src/libs/extensionsystem/pluginmanager.cpp
index 87ea5914b8..85dbf62983 100644
--- a/src/libs/extensionsystem/pluginmanager.cpp
+++ b/src/libs/extensionsystem/pluginmanager.cpp
@@ -641,11 +641,13 @@ void PluginManager::remoteArguments(const QString &serializedArgument, QObject *
     for (const PluginSpec *ps : plugins()) {
         if (ps->state() == PluginSpec::Running) {
             const QStringList pluginOptions = subList(serializedArguments, QLatin1Char(':') + ps->name());
-            QObject *socketParent = ps->plugin()->remoteCommand(pluginOptions, workingDirectory,
-                                                                arguments);
-            if (socketParent && socket) {
-                socket->setParent(socketParent);
-                socket = nullptr;
+            if (IPlugin *plugin = ps->plugin()) {
+                QObject *socketParent
+                    = plugin->remoteCommand(pluginOptions, workingDirectory, arguments);
+                if (socketParent && socket) {
+                    socket->setParent(socketParent);
+                    socket = nullptr;
+                }
             }
         }
     }