Ensure that allocateBtreePage() always clears the MemPage pointer when

it fails due to an I/O or memory allocation error.

FossilOrigin-Name: 09a38bf665902834936d39341627ded88142e6ae

1 files changed, 2 insertions, 2 deletions

diff --git a/src/btree.c b/src/btree.c
index d279c4c47..cc97dc6b1 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -5287,8 +5287,7 @@ int sqlite3BtreePrevious(BtCursor *pCur, int *pRes){
 ** sqlite3PagerUnref() on the new page when it is done.
 **
 ** SQLITE_OK is returned on success.  Any other return value indicates
-** an error.  *ppPage and *pPgno are undefined in the event of an error.
-** Do not invoke sqlite3PagerUnref() on *ppPage if an error is returned.
+** an error.  *ppPage is set to NULL in the event of an error.
 **
 ** If the "nearby" parameter is not 0, then an effort is made to 
 ** locate a page close to the page number "nearby".  This can be used in an
@@ -5532,6 +5531,7 @@ static int allocateBtreePage(
             rc = sqlite3PagerWrite((*ppPage)->pDbPage);
             if( rc!=SQLITE_OK ){
               releasePage(*ppPage);
+              *ppPage = 0;
             }
           }
           searchList = 0;