As a non-admin checkuser,
When I visit Special:InvestigateBlock
I am told that the functionality is only available to checkusers
Expected result:
Told that the functionality is only available to checkusers with block rights
Actual result:
Told that it is only available to checkusers
Notes:
Caused by SpecialInvestigateBlock::userCanExecute adding a check for for block rights but relying on the default parent displayRestrictionError method