isWal            44837 ext/sqlite3/libsqlite/sqlite3.c     int isWal;                    /* True if WAL file exists */
isWal            44845 ext/sqlite3/libsqlite/sqlite3.c       isWal = 0;
isWal            44848 ext/sqlite3/libsqlite/sqlite3.c           pPager->pVfs, pPager->zWal, SQLITE_ACCESS_EXISTS, &isWal
isWal            44852 ext/sqlite3/libsqlite/sqlite3.c       if( isWal ){