SQLite

    int bEof = 1;
    Fts5ExprTerm *p;

    /* Find the firstest rowid any synonym points to. */
    i64 iRowid = fts5ExprSynonymRowid(pTerm, pExpr->bDesc, 0);

    /* Advance each iterator that currently points to iRowid. Or, if iFrom
    ** is valid - each iterator that points to a rowid before iFrom.  */
    for(p=pTerm; p; p=p->pSynonym){
      if( sqlite3Fts5IterEof(p->pIter)==0 ){
        i64 ii = sqlite3Fts5IterRowid(p->pIter);
        if( ii==iRowid 
         || (bFromValid && ii!=iFrom && (ii>iFrom)==pExpr->bDesc) 
        ){
          if( bFromValid ){

        aBuiltin[i].zName,
        (void*)pApi,
        &aBuiltin[i].x,
        0
    );
  }

  return rc;
}

do_execsql_test 18.2 {
  SELECT t1.rowid, t2.rowid FROM t1, t2 WHERE t2 MATCH t1.a AND t1.rowid = t2.c
} {1 1}
do_execsql_test 18.3 {
  SELECT t1.rowid, t2.rowid FROM t2, t1 WHERE t2 MATCH t1.a AND t1.rowid = t2.c
} {1 1}

#--------------------------------------------------------------------
# fts5 table in the temp schema.
#
reset_db
do_execsql_test 19.0 {
  CREATE VIRTUAL TABLE temp.t1 USING fts5(x);
  INSERT INTO t1 VALUES('x y z');
  INSERT INTO t1 VALUES('w x 1');
  SELECT rowid FROM t1 WHERE t1 MATCH 'x';
} {1 2}
finish_test

# If SQLITE_ENABLE_FTS5 is defined, omit this file.
ifcapable !fts5 {
  finish_test
  return
}



#-------------------------------------------------------------------------
# OOM while rebuilding an FTS5 table.
#
do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE tt USING fts5(a, b);
  INSERT INTO tt VALUES('c d c g g f', 'a a a d g a');

  db eval { 
    CREATE VIRTUAL TABLE yu USING fts5(x, tokenize="unicode61 separators abc");
  }
} -test {
  faultsim_test_result {0 {}}
}



#-------------------------------------------------------------------------
#
# 5.2.* OOM while running a query that includes synonyms and matchinfo().
#
# 5.3.* OOM while running a query that returns a row containing instances
#       of more than 4 synonyms for a single term.
#

    43 {d dd fff fffff d f fff e dddd ee ee}
    44 {ff ffff eee ddd d dd ffff dddd d eeee d eeeeee}
    45 {eeee f eeeee ee e ffff f ddd e fff}
    46 {ffff d ffff eeee ffff eeeee f ffff ddddd eee}
    47 {dd dd dddddd ddddd fffff dddddd ddd ddddd eeeeee ffff eeee eee ee}
    48 {ffff ffff e dddd ffffff dd dd dddd f fffff}
    49 {ffffff d dddddd ffff eeeee f ffff ffff d dd fffff eeeee}

    50 {x e}
  } {
    execsql { INSERT INTO t1(rowid, a) VALUES($rowid, $text) }
  }
} {}

set res [list {*}{
  1 {3 24 8 2 12 6}

  db eval { 
    SELECT count(*) FROM t1 WHERE t1 MATCH 'd AND e AND f'
  }
} -test {
  faultsim_test_result {0 29}
}

do_faultsim_test 5.4 -faults oom* -prep {
  faultsim_restore_and_reopen
  sqlite3_fts5_create_tokenizer db tcl tcl_create
} -body {
  db eval { 
    SELECT count(*) FROM t1 WHERE t1 MATCH 'x + e'
  }
} -test {
  faultsim_test_result {0 1}
}

#-------------------------------------------------------------------------
catch { db close }
breakpoint
do_faultsim_test 6 -faults oom* -prep {
  sqlite_orig db test.db
  sqlite3_db_config_lookaside db 0 0 0
} -body {
  load_static_extension db fts5
} -test {
  faultsim_test_result {0 {}} {1 {initialization of fts5 failed: }}
  if {$testrc==0} {
    db eval { CREATE VIRTUAL TABLE temp.t1 USING fts5(x) }
  }
  db close
}
finish_test

  }

  4 {NEAR(q y, 20)} {
    1 {[yyyy] vvvvv [qq] oo [yyyyyy] vvvv eee} {ffff uu r qq aaaa}
    2 {ww oooooo bbbbb ssssss mm} {ffffff [yy] iiii rr s ccc [qqqqq]}
  }
} {
  do_execsql_test 6.1.$tn.asc {
    SELECT rowid, highlight(t2, 0, '[', ']'), highlight(t2, 1, '[', ']')
    FROM t2 WHERE t2 MATCH $q
  } $res

  set res2 [list]
  foreach {rowid a b} $res {
    set res2 [concat [list $rowid $a $b] $res2]
  }

  do_execsql_test 6.1.$tn.desc {
    SELECT rowid, highlight(t2, 0, '[', ']'), highlight(t2, 1, '[', ']')
    FROM t2 WHERE t2 MATCH $q ORDER BY rowid DESC
  } $res2
}

do_execsql_test 6.2.1 {
  INSERT INTO t2(rowid, a, b) VALUES(13,
      'x xx xxx xxxx xxxxx xxxxxx xxxxxxx', 'y yy yyy yyyy yyyyy yyyyyy yyyyyyy'
  );
  SELECT rowid, highlight(t2, 0, '<', '>'), highlight(t2, 1, '(', ')')