Index: src/build.c
==================================================================
--- src/build.c
+++ src/build.c
@@ -2265,11 +2265,11 @@
 void sqlite3DeferForeignKey(Parse *pParse, int isDeferred){
 #ifndef SQLITE_OMIT_FOREIGN_KEY
   Table *pTab;
   FKey *pFKey;
   if( (pTab = pParse->pNewTable)==0 || (pFKey = pTab->pFKey)==0 ) return;
-  assert( isDeferred==0 || isDeferred==1 );
+  assert( isDeferred==0 || isDeferred==1 ); /* EV: R-30323-21917 */
   pFKey->isDeferred = (u8)isDeferred;
 #endif
 }
 
 /*

Index: src/fkey.c
==================================================================
--- src/fkey.c
+++ src/fkey.c
@@ -1176,11 +1176,15 @@
 #ifndef SQLITE_OMIT_TRIGGER
     fkTriggerDelete(pTab->dbMem, pFKey->apTrigger[0]);
     fkTriggerDelete(pTab->dbMem, pFKey->apTrigger[1]);
 #endif
 
-    /* Delete the memory allocated for the FK structure. */
+    /* EV: R-30323-21917 Each foreign key constraint in SQLite is
+    ** classified as either immediate or deferred.
+    */
+    assert( pFKey->isDeferred==0 || pFKey->isDeferred==1 );
+
     pNext = pFKey->pNextFrom;
     sqlite3DbFree(pTab->dbMem, pFKey);
   }
 }
 #endif /* ifndef SQLITE_OMIT_FOREIGN_KEY */

Index: src/sqliteInt.h
==================================================================
--- src/sqliteInt.h
+++ src/sqliteInt.h
@@ -1287,10 +1287,11 @@
   FKey *pNextFrom;  /* Next foreign key in pFrom */
   char *zTo;        /* Name of table that the key points to (aka: Parent) */
   FKey *pNextTo;    /* Next foreign key on table named zTo */
   FKey *pPrevTo;    /* Previous foreign key on table named zTo */
   int nCol;         /* Number of columns in this key */
+  /* EV: R-30323-21917 */
   u8 isDeferred;    /* True if constraint checking is deferred till COMMIT */
   u8 aAction[2];          /* ON DELETE and ON UPDATE actions, respectively */
   Trigger *apTrigger[2];  /* Triggers for aAction[] actions */
   struct sColMap {  /* Mapping of columns in pFrom to columns in zTo */
     int iFrom;         /* Index of column in pFrom */