master and master will probably work just fine
as will REL1_28 and REL1_28 branches.
As for REL1_28 of core and master of Wikibase, well, anything could happen.

On Fri, 24 Mar 2017 at 11:03 Magnus Manske <magnusmanske@googlemail.com> wrote:
I am trying to install the (git HEAD) wikibase on a fresh MediaWiki stable (1.28.0) on Tool Labs.

MediaWiki is up, but using "Item:" namespace and some "Special:" pages die with a 500 error. Error log says:

2017-03-24 10:58:01: (mod_fastcgi.c.2702) FastCGI-stderr: PHP Catchable fatal error:  Argument 1 passed to Wikibase\SqlIdGenerator::__construct() must be an instance of Wikimedia\Rdbms\LoadBalancer, instance of LoadBalancer given, called in /data/project/comprende/public_html/extensions/Wikibase/repo/includes/Store/Sql/SqlStore.php on line 298 and defined in /data/project/comprende/public_html/extensions/Wikibase/repo/includes/Store/Sql/SqlIdGenerator.php on line 32

IMHO it's bad that a vanilla installation doesn't work out-of-the-box.
Any ideas how to fix this?
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