diff --git a/manifest b/manifest
index 6cd0f2a5c0..5c133b0db5 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Update\sreleasetest_data.tcl\sso\sthat\sthe\s"Fast-One"\sconfiguration\sruns\sbigmmap.test\sas\spart\sof\srelease\stesting.
-D 2020-08-19T15:24:19.261
+C Do\snot\sskip\sover\sTK_IF_NULL_ROW\soperators\swhen\sbypassing\sTK_COLLATE\soperators.\nFix\sto\scheck-in\s[ac31edd3eeafcef4]\swhich\swas\sitself\sa\sfix\sfor\sticket\n[45f4bf4eb4ffd788].
+D 2020-08-19T23:32:06.595
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -487,7 +487,7 @@ F src/date.c dace306a10d9b02ee553d454c8e1cf8d3c9b932e137738a6b15b90253a9bfc10
 F src/dbpage.c 8a01e865bf8bc6d7b1844b4314443a6436c07c3efe1d488ed89e81719047833a
 F src/dbstat.c 3aa79fc3aed7ce906e4ea6c10e85d657299e304f6049861fe300053ac57de36c
 F src/delete.c a2a603ab07cced8560065b0e2c4c9c842f2c5a2fd43d87355f95eb53bae7fe21
-F src/expr.c 58c06940d964c2cf455b979cf66a648499d294a5ee6dadcaeaed447257c1dc75
+F src/expr.c 616244b0f99ca50320b44c547972ed8de7e92c2088b300810b9ac804c40fbc9c
 F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
 F src/fkey.c 83372403298e6a7dd989a47aaacdbaa5b4307b5199dbd56e07d4896066b3de72
 F src/func.c 2333eb4277f55a5efdc12ef754e7d7ec9105d257b2fd00301d23ce1e8fa67dc0
@@ -535,12 +535,12 @@ F src/printf.c 9efcd4e984f22bcccb1ded37a1178cac98f6e3a0534e1e0629f64899971f8838
 F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
 F src/resolve.c d74715aceed2a8f493ba244d535646fa93132042a4400a29dfd26ec841514048
 F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92
-F src/select.c 510fdf819f218be3dac2683d3eaaf64e5080f548061a4dd12205590beda976bb
+F src/select.c 233e884d7da6601486c7b93aedb97fd29302ae5c03742d0e0eccb4790638bb77
 F src/shell.c.in b6d5d6ebeb8903e4946f23f0886f24133e0a9b6ecbc4cf90ede422ba297e73d5
 F src/sqlite.h.in d2c03414a8ee5d4a6855c04dd7cd5998e45139b0fe66b65bae86d4223edd091f
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 2d1af80082edffd71c6f96f70ad1ce6a4fb46615ad10291fc77fe0dea9ff0197
-F src/sqliteInt.h 86ad0f9164cbadb2ba9598cc6cf5b32bdb47b343c0da5ca62f3d73b60be55b65
+F src/sqliteInt.h 7dd1f3a93e801c90cf108149d041c6cc32d3e9503d66aa415455dae1614b6b53
 F src/sqliteLimit.h 95cb8479ca459496d9c1c6a9f76b38aee12203a56ce1092fe13e50ae2454c032
 F src/status.c 4b8bc2a6905163a38b739854a35b826c737333fab5b1f8e03fa7eb9a4799c4c1
 F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
@@ -1103,7 +1103,7 @@ F test/ioerr5.test 2edfa4fb0f896f733071303b42224df8bedd9da4
 F test/ioerr6.test a395a6ab144b26a9e3e21059a1ab6a7149cca65b
 F test/istrue.test 06f92ea38750fa74df7dbbe6920205251c2310861fbbe23a3adfa918a2e2ba74
 F test/join.test bca044589e94bb466e4c1e91fb6fecdc3f3326ca6b3f590f555f1958156eb321
-F test/join2.test 7d24d095ab88d3910228d53a3b548b7baf2e0e7d8aac6731a273e300e1b34b61
+F test/join2.test 21fc30e54ab35ed66bf51b89cec18729205497f5cc43c83bc042f96a73721593
 F test/join3.test 6f0c774ff1ba0489e6c88a3e77b9d3528fb4fda0
 F test/join4.test 1a352e4e267114444c29266ce79e941af5885916
 F test/join5.test 3a96dc62f0b45402d7207e22d1993fe0c2fce1c57644a11439891dd62b990eb7
@@ -1879,7 +1879,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P d8e47382160e98be646ce3ba568578493088d1bb11d513ded3e00b576fb07f06
-R ea1afde48f0d02557391a4047adf2310
-U dan
-Z d5829a9d86564dfb4bfa4de08f611888
+P a0aa35aaa5694a96638a7c7b1cd69c7523750cbe95831a13c1ee5a6d48256b76
+R 75dc1e0cc2548901d96acdc048327264
+U drh
+Z 82ae660e681a73fcc0f28cd7c0e29f86
diff --git a/manifest.uuid b/manifest.uuid
index aad562bbea..01783fafbc 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-a0aa35aaa5694a96638a7c7b1cd69c7523750cbe95831a13c1ee5a6d48256b76
\ No newline at end of file
+871f2ddcfbb9196dbd851a350e3471ee6d242d86bbd755201f7e2406fce3ac55
\ No newline at end of file
diff --git a/src/expr.c b/src/expr.c
index b64ea28bf5..244412b384 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -44,7 +44,7 @@ char sqlite3TableColumnAffinity(Table *pTab, int iCol){
 */
 char sqlite3ExprAffinity(const Expr *pExpr){
   int op;
-  while( ExprHasProperty(pExpr, EP_Skip) ){
+  while( ExprHasProperty(pExpr, EP_Skip|EP_IfNullRow) ){
     assert( pExpr->op==TK_COLLATE || pExpr->op==TK_IF_NULL_ROW );
     pExpr = pExpr->pLeft;
     assert( pExpr!=0 );
@@ -115,7 +115,7 @@ Expr *sqlite3ExprAddCollateString(Parse *pParse, Expr *pExpr, const char *zC){
 */
 Expr *sqlite3ExprSkipCollate(Expr *pExpr){
   while( pExpr && ExprHasProperty(pExpr, EP_Skip) ){
-    assert( pExpr->op==TK_COLLATE || pExpr->op==TK_IF_NULL_ROW );
+    assert( pExpr->op==TK_COLLATE );
     pExpr = pExpr->pLeft;
   }   
   return pExpr;
@@ -134,7 +134,7 @@ Expr *sqlite3ExprSkipCollateAndLikely(Expr *pExpr){
       assert( pExpr->op==TK_FUNCTION );
       pExpr = pExpr->x.pList->a[0].pExpr;
     }else{
-      assert( pExpr->op==TK_COLLATE || pExpr->op==TK_IF_NULL_ROW );
+      assert( pExpr->op==TK_COLLATE );
       pExpr = pExpr->pLeft;
     }
   }   
diff --git a/src/select.c b/src/select.c
index 8b1fae75a5..9568dbadc9 100644
--- a/src/select.c
+++ b/src/select.c
@@ -3506,7 +3506,7 @@ static Expr *substExpr(
           ifNullRow.op = TK_IF_NULL_ROW;
           ifNullRow.pLeft = pCopy;
           ifNullRow.iTable = pSubst->iNewTable;
-          ifNullRow.flags = EP_Skip;
+          ifNullRow.flags = EP_IfNullRow;
           pCopy = &ifNullRow;
         }
         testcase( ExprHasProperty(pCopy, EP_Subquery) );
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index a5d108b6c7..f2c4f63c0d 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -2715,7 +2715,7 @@ struct Expr {
 #define EP_TokenOnly  0x004000 /* Expr struct EXPR_TOKENONLYSIZE bytes only */
 #define EP_Win        0x008000 /* Contains window functions */
 #define EP_MemToken   0x010000 /* Need to sqlite3DbFree() Expr.zToken */
-                  /*  0x020000 // available for reuse */
+#define EP_IfNullRow  0x020000 /* The TK_IF_NULL_ROW opcode */
 #define EP_Unlikely   0x040000 /* unlikely() or likelihood() function */
 #define EP_ConstFunc  0x080000 /* A SQLITE_FUNC_CONSTANT or _SLOCHNG function */
 #define EP_CanBeNull  0x100000 /* Can be null despite NOT NULL constraint */
diff --git a/test/join2.test b/test/join2.test
index 82d597c584..f004fda071 100644
--- a/test/join2.test
+++ b/test/join2.test
@@ -294,7 +294,10 @@ do_execsql_test 8.1 {
 }
 
 #-------------------------------------------------------------------------
-# Ticket [45f4bf4eb].
+# Ticket [45f4bf4eb] reported by Manuel Rigger (2020-04-25)
+#
+# Follow up error reported by Eric Speckman on the SQLite forum
+# https://sqlite.org/forum/info/c49496d24d35bd7c (2020-08-19)
 #
 reset_db
 do_execsql_test 9.0 {
@@ -324,5 +327,17 @@ do_execsql_test 9.5 {
   UNION SELECT 0,0 WHERE 0; 
 } {0 0}
 
+do_execsql_test 9.10 {
+  CREATE TABLE t1 (aaa);
+  INSERT INTO t1 VALUES(23456);
+  CREATE TABLE t2(bbb);
+  CREATE VIEW v2(ccc) AS SELECT bbb IS 1234 FROM t2;
+  SELECT ccc, ccc IS NULL AS ddd FROM t1 LEFT JOIN v2;
+} {{} 1}
+optimization_control db query-flattener 0
+do_execsql_test 9.11 {
+  SELECT ccc, ccc IS NULL AS ddd FROM t1 LEFT JOIN v2;
+} {{} 1}
+
 
 finish_test