TYPO3 Core

Reproduce:

prepare: enter install tool and select "Production preset"
prepare: log out from install tool
clean up: Remove typo3temp/InstallTollSessions directory
create one session file: touch ENABLE_INSTALL_TOOL and call typo3/install/index.php so install tool login is shown
kill session file permissions: go to typo3temp/InstallTollSessions/*the-created-session-hash-folder*, chmod 550 on session-hash-folder, chmod 440 on hash_* file. This removes write permission on both session-hash-folder and the session file
try to log in with correct password: Login is not successful and no error is shown

1. Time Memory Function Location
   1 0.0001 231312 {main}( ) ../Install.php:0
   2 0.0001 231888 require( '/var/www/t3master/cms/typo3/sysext/install/Resources/Private/PHP/Boot.php' ) ../Install.php:112
   3 0.0407 2019272 TYPO3\CMS\Install\Controller\StepController->execute( ) ../Boot.php:39
   4 0.0497 2201832 TYPO3\CMS\Install\Controller\AbstractController->outputLoginFormIfNotAuthorized( ) ../StepController.php:59
   5 0.0952 3079080 TYPO3\CMS\Install\Controller\AbstractController->output( ) ../AbstractController.php:265
   6 0.0953 3078904 TYPO3\CMS\Install\Service\SessionService->__destruct( ) ../SessionService.php:0
   7 0.0953 3078952 session_write_close ( ) ../SessionService.php:416
   8 0.0953 3079600 TYPO3\CMS\Install\Service\SessionService->write( ) ../SessionService.php:416
   9 0.0953 3079896 TYPO3\CMS\Core\Utility\GeneralUtility::writeFile( ) ../SessionService.php:368
   10 0.0953 3080080 fopen ( ) ../GeneralUtility.php:2560
   11 0.0954 3082336 TYPO3\CMS\Core\Error\ErrorHandler->handleError( ) ../GeneralUtility.php:2560

Another one if permissions to the session-hash-folder are set to 440 instead of 550

#1: PHP Warning: filemtime(): stat failed for /var/www/t3master/cms/typo3temp/InstallToolSessions/c14704f9419f9ff2a0f07c233acc51bb7fa070fa/hash_ded5e1d44e38cc2576953c0ac29cbced in /var/www/t3master/cms/typo3/sysext/install/Classes/Service/SessionService.php line 395 (More information)

TYPO3\CMS\Core\Error\Exception thrown in file
/var/www/t3master/cms/typo3/sysext/core/Classes/Error/ErrorHandler.php in line 102.

Use case on how to fall into this issue:

Have an instance on a test server and call install tool ... all good. Session will be created within typo3temp/InstallToolSessions. After that, copy the whole instance over to a different server / folder, but fail to fix permission properly. The session directory will then still exist, but can not be written -> no login to install tool possible and no error message.

Patch set 2 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at http://review.typo3.org/37025

Patch set 1 for branch TYPO3_6-2 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at http://review.typo3.org/37028