Index: src/insert.c
==================================================================
--- src/insert.c
+++ src/insert.c
@@ -645,10 +645,11 @@
     rc = sqlite3Select(pParse, pSelect, &dest);
     regFromSelect = dest.iSdst;
     assert( pParse->nErr==0 || rc );
     if( rc || db->mallocFailed ) goto insert_cleanup;
     sqlite3VdbeAddOp1(v, OP_EndCoroutine, regYield);
+    sqlite3ClearTempRegCache(pParse);
     sqlite3VdbeJumpHere(v, addrTop - 1);                       /* label B: */
     assert( pSelect->pEList );
     nColumn = pSelect->pEList->nExpr;
 
     /* Set useTempTable to TRUE if the result of the SELECT statement

Index: src/select.c
==================================================================
--- src/select.c
+++ src/select.c
@@ -2749,10 +2749,11 @@
   VdbeComment((v, "left SELECT"));
   pPrior->iLimit = regLimitA;
   explainSetInteger(iSub1, pParse->iNextSelectId);
   sqlite3Select(pParse, pPrior, &destA);
   sqlite3VdbeAddOp1(v, OP_EndCoroutine, regAddrA);
+  sqlite3ClearTempRegCache(pParse);
   sqlite3VdbeJumpHere(v, j1);
 
   /* Generate a coroutine to evaluate the SELECT statement on 
   ** the right - the "B" select
   */
@@ -2766,10 +2767,11 @@
   explainSetInteger(iSub2, pParse->iNextSelectId);
   sqlite3Select(pParse, p, &destB);
   p->iLimit = savedLimit;
   p->iOffset = savedOffset;
   sqlite3VdbeAddOp1(v, OP_EndCoroutine, regAddrB);
+  sqlite3ClearTempRegCache(pParse);
 
   /* Generate a subroutine that outputs the current row of the A
   ** select as the next output row of the compound select.
   */
   VdbeNoopComment((v, "Output routine for A"));