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Fix a segfault that could occur following an OOM while processing a SELECT statement for which one or more of the expressions in the window frame declaration are themselves sub-selects that use window functions.

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FossilOrigin-Name: 75aec4fc886c04fe098828cc03bc72c197cbf40f0a1890fe5bbb98d4fd5c3c7e
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dan
2019-08-20 14:43:01 +00:00
parent 95da9d5d46
commit 4780b9ad46
4 changed files with 32 additions and 10 deletions
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src/expr.c
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@@ -1511,7 +1511,7 @@ Select *sqlite3SelectDup(sqlite3 *db, Select *pDup, int flags){
#ifndef SQLITE_OMIT_WINDOWFUNC
pNew->pWin = 0;
pNew->pWinDefn = sqlite3WindowListDup(db, p->pWinDefn);
if( p->pWin ) gatherSelectWindows(pNew);
if( p->pWin && db->mallocFailed==0 ) gatherSelectWindows(pNew);
#endif
pNew->selId = p->selId;
*pp = pNew;