pagerUndoCallback 39730 ext/sqlite3/libsqlite/sqlite3.c   rc = sqlite3WalUndo(pPager->pWal, pagerUndoCallback, (void *)pPager);
pagerUndoCallback 39734 ext/sqlite3/libsqlite/sqlite3.c     rc = pagerUndoCallback((void *)pPager, pList->pgno);