2 files changed, 4 insertions, 0 deletions
diff --git a/src/vdbe.c b/src/vdbe.c
index 71f30b754..d071c545a 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -5983,6 +5983,8 @@ case OP_IdxRowid: {           /* out2 */
       pTabCur->deferredMoveto = 1;
       assert( pOp->p4type==P4_INTARRAY || pOp->p4.ai==0 );
       pTabCur->aAltMap = pOp->p4.ai;
+      assert( !pC->isEphemeral );
+      assert( !pTabCur->isEphemeral );
       pTabCur->pAltCursor = pC;
     }else{
       pOut = out2Prerelease(p, pOp);
diff --git a/src/vdbeaux.c b/src/vdbeaux.c
index ede652dfa..662379ea8 100644
--- a/src/vdbeaux.c
+++ b/src/vdbeaux.c
@@ -2472,6 +2472,7 @@ void sqlite3VdbeFreeCursor(Vdbe *p, VdbeCursor *pCx){
     return;
   }
   assert( pCx->pBtx==0 || pCx->eCurType==CURTYPE_BTREE );
+  assert( pCx->pBtx==0 || pCx->isEphemeral );
   switch( pCx->eCurType ){
     case CURTYPE_SORTER: {
       sqlite3VdbeSorterClose(p->db, pCx);
@@ -3569,6 +3570,7 @@ int sqlite3VdbeCursorMoveto(VdbeCursor **pp, u32 *piCol){
   assert( p->eCurType==CURTYPE_BTREE || p->eCurType==CURTYPE_PSEUDO );
   if( p->deferredMoveto ){
     u32 iMap;
+    assert( !p->isEphemeral );
     if( p->aAltMap && (iMap = p->aAltMap[1+*piCol])>0 && !p->nullRow ){
       *pp = p->pAltCursor;
       *piCol = iMap - 1;