Wikimedia Bugzilla is closed!

STEPS:

1. Delete all data from table "Category"
2. Set read-only mode:
  $wgReadOnly = 'Wiki engine upgrade';
3. Launch populateCategory maintenance script to re-create data:
  php maintenance/populateCategory.php --force

ACTUAL:

Script reports about success:
"Category population complete."
But actually nothing is changed (table "Category" is still empty) because of read-only mode.

EXPECTED:

There are two possible ways of correct behavior:
1. Ignore $wgReadOnly and perform database update (like update.php does)
2. Take $wgReadOnly into account and output proper message