diff --git a/manifest b/manifest
index 4259fbc66c..481336b693 100644
--- a/manifest
+++ b/manifest
@@ -1,11 +1,11 @@
 B fd5abb1a7b5a55127d5c0d5ff448020d8bccab44e4f5afe1eb88fc19578af735
-C Identifiers\s"TRUE"\sand\s"FALSE"\scannot\stake\son\stheir\sboolean\sconstant\svalues\sif\nthey\sare\soperands\sof\sthe\s"."\soperator.
-D 2020-06-13T03:18:21.016
+C Avoid\sdeleting\sexpression\snodes\sin\sthe\sflattener\scode,\sas\sthey\smay\sbe\sreferenced\sby\sAggInfo\sobjects\sfurther\sup\sthe\sstack.
+D 2020-06-13T21:24:40.551
 F ext/fts3/fts3.c acc51e4378dd772251b31ead0ccd19070fc1774f6f6a55b11e00cb885e0f34bc
 F src/btree.c fabc215bd1ebab0e48108e95e0f50531da9883156b95888f479f6c696db032ad
 F src/expr.c 36bb737d2ca78ee9bd4fde46cf1e51a37e7e1b263e55fccfaef32922a19e9524
 F src/global.c 0409ae635839e0bef26a69b68be64126ab6cba62ac19bd7694f1652e591c4c17
-F src/select.c 929e1c0db3cb3d9f7d2304c6596868abcb6dfd7c2a0ac1bdf12a5a4432078ba4
+F src/select.c 1a791ad41c35ec24217b8da877a4deb2a9e22a1dfae2bc46d68d9ad4e4bf8f40
 F src/sqliteInt.h fe320867c4f48eeeca523062c5668508b3f9b88d65690d42610bd138a5fdb5c4
 F src/test1.c e9f68f157f8fd027ee4c32c4b427f4eed274749bfb745427e2d954fa89d95ad3
 F src/window.c 88a63e6948ea924b3cf9ad8aff5ea1fa53bebdb2f13340867205fda16ed0f19c
@@ -13,8 +13,9 @@ F test/fts3corrupt2.test e318f0676e5e78d5a4b702637e2bb25265954c08a1b1e4aaf93c788
 F test/fts3corrupt4.test e77b06926348eb45b71569f9dc45e5b19c984ca1b1ef6671367f4ca9d6eaa973
 F test/fuzzdata8.db b87ae726c84c3f80d457642d7650724a76eb3d7b76258959d712cc4d926ddfc7
 F test/istrue.test 06f92ea38750fa74df7dbbe6920205251c2310861fbbe23a3adfa918a2e2ba74
+F test/select3.test c49fbb758903f3718e2de5aa4655eda4838131cbea24a86db908f8b6889aa68c
 F test/window1.test 9d7f4990e5b36d95af93b189da4aa75216c6690ce95cced3c8b6d3234be51c2c
-P 14a5cbddc887e23a684fabab1a213cce261bd6cffa0663d4f138b92d0b65b9c2
-R ebfcb880c83916e081aacf3bd673aef2
-U drh
-Z f044363c3bc3fa94bf2e0fcb83823aba
+P ad738286e2441b5e84d05366db3fcafabe66be766f21fe6c17f43a8fabab16fb
+R 5e5118679cf69aa40cdce2d30c720aca
+U dan
+Z 711c877ed46b56919faaa443580ab634
diff --git a/manifest.uuid b/manifest.uuid
index 3cd9d72d8e..b498bd973f 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-ad738286e2441b5e84d05366db3fcafabe66be766f21fe6c17f43a8fabab16fb
\ No newline at end of file
+cc1fffdeddf422404170fa163ab80372ae58b444d7012b2c164021b221709b3e
\ No newline at end of file
diff --git a/src/select.c b/src/select.c
index e89db37aeb..ae41aaf81f 100644
--- a/src/select.c
+++ b/src/select.c
@@ -4115,7 +4115,13 @@ static int flattenSubquery(
     if( isLeftJoin>0 ){
       sqlite3SetJoinExpr(pWhere, iNewParent);
     }
-    pParent->pWhere = sqlite3ExprAnd(pParse, pWhere, pParent->pWhere);
+    if( pWhere ){
+      if( pParent->pWhere ){
+        pParent->pWhere = sqlite3PExpr(pParse, TK_AND, pWhere, pParent->pWhere);
+      }else{
+        pParent->pWhere = pWhere;
+      }
+    }
     if( db->mallocFailed==0 ){
       SubstContext x;
       x.pParse = pParse;
diff --git a/test/select3.test b/test/select3.test
index 50039c551e..fec8ba4a51 100644
--- a/test/select3.test
+++ b/test/select3.test
@@ -314,4 +314,13 @@ do_execsql_test select3-9.100 {
   SELECT * FROM t0 GROUP BY c0;
 } {1.0 1.0}
 
+reset_db
+do_execsql_test select3.10.100 {
+  CREATE TABLE t1(a, b);
+  CREATE TABLE t2(c, d);
+  SELECT max(t1.a), 
+         (SELECT 'xyz' FROM (SELECT * FROM t2 WHERE 0) WHERE t1.b=1) 
+  FROM t1;
+} {{} {}}
+
 finish_test