Index: ext/fts5/fts5_buffer.c
==================================================================
--- ext/fts5/fts5_buffer.c
+++ ext/fts5/fts5_buffer.c
@@ -290,15 +290,16 @@
 **
 **   * All non-ASCII characters,
 **   * The 52 upper and lower case ASCII characters, and
 **   * The 10 integer ASCII characters.
 **   * The underscore character "_" (0x5F).
+**   * The unicode "subsitute" character (0x1A).
 */
 int sqlite3Fts5IsBareword(char t){
   u8 aBareword[128] = {
     0, 0, 0, 0, 0, 0, 0, 0,    0, 0, 0, 0, 0, 0, 0, 0,   /* 0x00 .. 0x0F */
-    0, 0, 0, 0, 0, 0, 0, 0,    0, 0, 0, 0, 0, 0, 0, 0,   /* 0x10 .. 0x1F */
+    0, 0, 0, 0, 0, 0, 0, 0,    0, 0, 1, 0, 0, 0, 0, 0,   /* 0x10 .. 0x1F */
     0, 0, 0, 0, 0, 0, 0, 0,    0, 0, 0, 0, 0, 0, 0, 0,   /* 0x20 .. 0x2F */
     1, 1, 1, 1, 1, 1, 1, 1,    1, 1, 0, 0, 0, 0, 0, 0,   /* 0x30 .. 0x3F */
     0, 1, 1, 1, 1, 1, 1, 1,    1, 1, 1, 1, 1, 1, 1, 1,   /* 0x40 .. 0x4F */
     1, 1, 1, 1, 1, 1, 1, 1,    1, 1, 1, 0, 0, 0, 0, 1,   /* 0x50 .. 0x5F */
     0, 1, 1, 1, 1, 1, 1, 1,    1, 1, 1, 1, 1, 1, 1, 1,   /* 0x60 .. 0x6F */

Index: ext/fts5/fts5_index.c
==================================================================
--- ext/fts5/fts5_index.c
+++ ext/fts5/fts5_index.c
@@ -4685,14 +4685,14 @@
 ** copies the position list into the buffer supplied as the second 
 ** argument.
 */
 int sqlite3Fts5IterPoslistBuffer(Fts5IndexIter *pIter, Fts5Buffer *pBuf){
   Fts5Index *p = pIter->pIndex;
-
+  Fts5SegIter *pSeg = &pIter->aSeg[ pIter->aFirst[1].iFirst ];
   assert( p->rc==SQLITE_OK );
   fts5BufferZero(pBuf);
-  fts5MultiIterPoslist(p, pIter, 0, 0, pBuf);
+  fts5SegiterPoslist(p, pSeg, 0, pBuf);
   return fts5IndexReturn(p);
 }
 
 /*
 ** Close an iterator opened by an earlier call to sqlite3Fts5IndexQuery().

Index: ext/fts5/test/fts5simple.test
==================================================================
--- ext/fts5/test/fts5simple.test
+++ ext/fts5/test/fts5simple.test
@@ -248,9 +248,39 @@
 }
 
 do_execsql_test 10.1 {
   SELECT rowid FROM t3('c: c*');
 } {2}
+
+#-------------------------------------------------------------------------
+# Test that character 0x1A is allowed in fts5 barewords.
+#
+do_test 11.0 {
+  execsql "CREATE VIRTUAL TABLE t4 USING fts5(x, tokenize=\"ascii tokenchars '\x1A'\")"
+  execsql "
+    INSERT INTO t4 VALUES('a b c \x1A');
+    INSERT INTO t4 VALUES('a b c d\x1A');
+    INSERT INTO t4 VALUES('a b c \x1Ad');
+    INSERT INTO t4 VALUES('a b c d');
+  "
+} {}
+
+do_test 11.1 {
+  execsql "SELECT rowid FROM t4('\x1A')"
+} {1}
+do_test 11.2 {
+  execsql "SELECT rowid FROM t4('\x1A*')"
+} {1 3}
+do_test 11.3 {
+  execsql "SELECT rowid FROM t4('d\x1A')"
+} {2}
+
+do_test 11.4 {
+  catchsql "SELECT rowid FROM t4('d\x1B')"
+} {/fts5: syntax error/}
+do_test 11.5 {
+  catchsql "SELECT rowid FROM t4('d\x19')"
+} {/fts5: syntax error/}
 
 
 finish_test