TYPO3 Core

Currently the Extension manager will fail to calculate dependencies correctly, when a require statement with a composer compatible package name is used:

E.g. when I put

"require": {
    "typo3-ter/news": "*" 
},

in the composer.json of an extension that is based the news extension, the Extension manager will throw an Exception, because he does not know the "typo3-ter/news" extension.

It is also not possible to just use

"require": {
    "news": "*" 
},

because the composer does not know about this extension and will fail to build the correct requirements (see also #63605).

A possible solution would be to cut off the typo3-ter prefix when the requirements are calculated.