Bug #59147
closedWrong extension precedence in TYPO3 6.2
100%
Description
When an extension is installed locally in typo3conf/ext/ it should always take precedence over a system extension from typo3/sysext/.
This was the case in the last LTS and is still documented like that here:
http://docs.typo3.org/TYPO3/CoreApiReference/ExtensionArchitecture/SystemGlobalAndLocalExtensions/Index.html
However in 6.2.3 this is not the case. When I try to install t3skin locally and open the extension manager, it reverts to the system extension always.
I tracked this behaviour down to typo3/sysext/core/Classes/Package/PackageManager.php.
The reason are lines 85-90. Because they are used to iterate the extension paths, the typo3conf/ext/ path is found first and typo3/sysext/ last. When the found extension paths are traversed, naturally the latter overwrites the first, leaving the system extension active always. And since the extension manager aggressively tries to save the PackageStates (which is a good thing), the system extension is active again after I open the extension manager.
Patch will be attached.
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