bPersist         50815 ext/sqlite3/libsqlite/sqlite3.c         int bPersist = -1;
bPersist         50817 ext/sqlite3/libsqlite/sqlite3.c             pWal->pDbFd, SQLITE_FCNTL_PERSIST_WAL, &bPersist
bPersist         50819 ext/sqlite3/libsqlite/sqlite3.c         if( bPersist!=1 ){