// switch to degraded mode with safe_mode only if errors on a first install

install-dev/controllers/http/process.php

@@ -109,6 +109,8 @@ class InstallControllerHttpProcess extends InstallControllerHttp
 			{
 				$this->session->process_validated = array();
 				$this->session->database_clear = true;
+				if (Tools::getSafeModeStatus())
+					$this->session->safe_mode = true;
 			}
 			elseif (!Tools::getValue('submitNext'))
 			{

install-dev/models/install.php

@@ -393,7 +393,7 @@ class InstallModelInstall extends InstallAbstractModel
 		Configuration::loadConfiguration();
 
 		// use the old image system if the safe_mod is enabled otherwise the installer will fail with the fixtures installation
-		if (Tools::getSafeModeStatus())
+		if (InstallSession::getInstance()->safe_mode)
 			Configuration::updateGlobalValue('PS_LEGACY_IMAGES', 				1);
 	
 		$id_country = Country::getByIso($data['shop_country']);
@@ -606,7 +606,7 @@ class InstallModelInstall extends InstallAbstractModel
 	 */
 	public function installModules($module = null)
 	{
-		if (Tools::getSafeModeStatus())
+		if (InstallSession::getInstance()->safe_mode)
 			return true;
 
 		$modules = $module ? array($module) : $this->getModulesList();