TYPO3 Core

There is a PHP error in t3lib/error/class.t3lib_error_errorhandler.php:

[18-Jan-2010 13:20:08] PHP Fatal error: Class 't3lib_div' not found in /Users/valdo/Sites/ael1/typo3conf/ext/pm_self_care/class.tx_pmselfcare.php on line 778
[18-Jan-2010 13:20:08] PHP Stack trace:
[18-Jan-2010 13:20:08] PHP 1. {main}() /Users/valdo/Sites/ael1/index.php:0
[18-Jan-2010 13:20:08] PHP 2. require() /Users/valdo/Sites/ael1/index.php:76
[18-Jan-2010 13:20:08] PHP 3. include() /Users/valdo/Sites/typo3_trunk/typo3/sysext/cms/tslib/index_ts.php:438
[18-Jan-2010 13:20:08] PHP 4. t3lib_error_ErrorHandler->handleError() /Users/valdo/Sites/typo3_trunk/t3lib/error/class.t3lib_error_errorhandler.php:0

Alternatively in commented lines 123, lines 135 and lines 143 of t3lib/error/class.t3lib_error_errorhandler.php and the error disappeared.

I'm using TYPO3_4-3 branch rev 6802 (last), but the bug can be reproduced on 4.3.0 final and 4.3.1

(issue imported from #M13284)