Preventing package uninstallation if not applicable

diff --git a/wcfsetup/install/files/lib/acp/action/UninstallPackageAction.class.php b/wcfsetup/install/files/lib/acp/action/UninstallPackageAction.class.php
index 97681854ffb29241cd4ab6de97db9014abb80cb9..afde398b8ac61e3c69f6494d9a55420dcace9f3b 100644 (file)
--- a/wcfsetup/install/files/lib/acp/action/UninstallPackageAction.class.php
+++ b/wcfsetup/install/files/lib/acp/action/UninstallPackageAction.class.php
@@ -59,7 +59,7 @@ class UninstallPackageAction extends InstallPackageAction {
         */
        protected function stepPrepare() {
                $package = new Package($this->packageID);
-               if (!$package->packageID) {
+               if (!$package->packageID || !$package->canUninstall()) {
                        throw new IllegalLinkException();
                }