Whenever there is a real MySQL database error (most frequently when there
is an attempt to add a row with a duplicate key into the session table), I
also get warnings about references to an undefined variable "_lock_count".
I could not find the real cause but moving the line
$this->_lock_count = 0;
from the bottom (line 99 or so) of
WikiDB_backend_PearDB->WikiDB_backend_PearDB() to the top (line 14) fixed
it for me.
regards,
Charles
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