Index: test/instr.test
==================================================================
--- test/instr.test
+++ test/instr.test
@@ -254,7 +254,28 @@
 do_execsql_test instr-1.64 {
   CREATE TABLE x1(a, b);
   INSERT INTO x1 VALUES(X'', 'abc');
   SELECT instr(a, b) FROM x1;
 } 0
+
+# 2019-09-16 ticket https://www.sqlite.org/src/info/587791f92620090e
+#
+do_execsql_test instr-2.0 {
+  DROP TABLE IF EXISTS t0;
+  CREATE TABLE t0(c0 PRIMARY KEY, c1);
+  INSERT INTO t0(c0) VALUES (x'bb'), (0);
+  SELECT COUNT(*) FROM t0 WHERE INSTR(x'aabb', t0.c0) ORDER BY t0.c0, t0.c1;
+} {1}
+do_execsql_test instr-2.1 {
+  SELECT quote(c0) FROM t0 WHERE INSTR(x'aabb', t0.c0) ORDER BY t0.c0, t0.c1;
+} {X'BB'}
+do_execsql_test instr-2.2 {
+  DROP TABLE IF EXISTS t1;
+  CREATE TABLE t1(x);
+  INSERT INTO t1(x) VALUES('text'),(x'bb');
+  SELECT quote(x) FROM t1 WHERE instr(x'aabb',x);
+} {X'BB'}
+do_execsql_test instr-2.3 {
+  SELECT quote(x) FROM t1 WHERE x>'zzz' AND instr(x'aabb',x);
+} {X'BB'}
 
 finish_test