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Make sure every co-routines has its own set of temporary registers and does

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not share temporaries, since a co-routine might expect the content of a
temporary register to be preserved across an OP_Yield.
Proposed fix for ticket [d06a25c84454a].

FossilOrigin-Name: ca72be8618e5d466d6f35819ca8bbd2b84269959
This commit is contained in:
drh
2016-02-09 02:12:20 +00:00
parent e48f1ed9bf
commit 2fade2f791
8 changed files with 54 additions and 18 deletions
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6
src/select.c
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@@ -2952,7 +2952,7 @@ static int multiSelectOrderBy(
pPrior->iLimit = regLimitA;
explainSetInteger(iSub1, pParse->iNextSelectId);
sqlite3Select(pParse, pPrior, &destA);
sqlite3VdbeAddOp1(v, OP_EndCoroutine, regAddrA);
sqlite3VdbeEndCoroutine(v, regAddrA);
sqlite3VdbeJumpHere(v, addr1);
/* Generate a coroutine to evaluate the SELECT statement on
@@ -2969,7 +2969,7 @@ static int multiSelectOrderBy(
sqlite3Select(pParse, p, &destB);
p->iLimit = savedLimit;
p->iOffset = savedOffset;
sqlite3VdbeAddOp1(v, OP_EndCoroutine, regAddrB);
sqlite3VdbeEndCoroutine(v, regAddrB);
/* Generate a subroutine that outputs the current row of the A
** select as the next output row of the compound select.
@@ -4990,7 +4990,7 @@ int sqlite3Select(
pItem->pTab->nRowLogEst = sqlite3LogEst(pSub->nSelectRow);
pItem->fg.viaCoroutine = 1;
pItem->regResult = dest.iSdst;
sqlite3VdbeAddOp1(v, OP_EndCoroutine, pItem->regReturn);
sqlite3VdbeEndCoroutine(v, pItem->regReturn);
sqlite3VdbeJumpHere(v, addrTop-1);
sqlite3ClearTempRegCache(pParse);
}else{