Do not set the P3 parameter on OP_RowCell when copying an index btree, as

P3 is not used in that case.

FossilOrigin-Name: eef070a4aadf02a845d0ed00767be049d3b76e811e24797a116776fa836d1b03

src/insert.c

@@ -2991,7 +2991,7 @@ static int xferOptimization(
       if( i==pSrcIdx->nColumn ){
         idxInsFlags = OPFLAG_USESEEKRESULT|OPFLAG_PREFORMAT;
         sqlite3VdbeAddOp1(v, OP_SeekEnd, iDest);
-        sqlite3VdbeAddOp3(v, OP_RowCell, iDest, iSrc, regData);
+        sqlite3VdbeAddOp2(v, OP_RowCell, iDest, iSrc);
       }
     }else if( !HasRowid(pSrc) && pDestIdx->idxType==SQLITE_IDXTYPE_PRIMARYKEY ){
       idxInsFlags |= OPFLAG_NCHANGE;

src/vdbe.c

@@ -5160,6 +5160,8 @@ case OP_RowCell: {
   VdbeCursor *pSrc;               /* Cursor to read from */
   i64 iKey;                       /* Rowid value to insert with */
   assert( pOp[1].opcode==OP_Insert || pOp[1].opcode==OP_IdxInsert );
+  assert( pOp[1].opcode==OP_Insert    || pOp->p3==0 );
+  assert( pOp[1].opcode==OP_IdxInsert || pOp->p3>0 );
   assert( pOp[1].p5 & OPFLAG_PREFORMAT );
   pDest = p->apCsr[pOp->p1];
   pSrc = p->apCsr[pOp->p2];