[TYPO3-core] RFC: #16825: Fatal error in lang.php

[Georg Ringer]

This is an SVN patch request.

Type: Bug, nobrainer

http://bugs.typo3.org/view.php?id=16825

Branches: trunk, 4-4, 4-3

Problem:
because of type hinting an fatal error can occur in EXT:lang/lang.php

problem is inside t3lib_div::readLLfile (called by $this->readLLfile)
which can give back either a filled array, an empty array or FALSE if
there was an error.
therefore the line
-----
t3lib_div::array_merge_recursive_overrule((array)$LOCAL_LANG, $llang);
-----
produces a crash because $llang can be boolean and not an array.

Solution:
Check if it is an array

To reproduce:
I don't really know how to reproduce because it happend after migrating
a site and forgetting to install tt_address. i can only guess that
somehow files were tried to be called. anyway the problem is simple to
explain and to fix

Kind regards,
Georg
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