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Fix a problem in sqlite3BtreeDelete() in which deleting an entry from a

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corrupt database can leave a btree page with zero cells.

FossilOrigin-Name: 682053d1e603c21b8085c39db618a39b23ec8d2c4d822fd19634db0e03038ea2
This commit is contained in:
drh
2018-12-13 21:05:45 +00:00
parent f7e74904cc
commit 1641f11f4c
6 changed files with 26 additions and 10 deletions
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src/btree.c
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@@ -8623,6 +8623,7 @@ int sqlite3BtreeDelete(BtCursor *pCur, u8 flags){
if( bPreserve ){
if( !pPage->leaf
|| (pPage->nFree+cellSizePtr(pPage,pCell)+2)>(int)(pBt->usableSize*2/3)
|| pPage->nCell==1 /* See dbfuzz001.test for a test case */
){
/* A b-tree rebalance will be required after deleting this entry.
** Save the cursor key. */