ITS#8321 Fix mdb_cursor_set

hyc · hyc · commit 7881fd0fa7db · 2015-11-24T15:59:52.000Z
Always reinit mc_pg[0] if cursor is not C_INITIALIZED
It might have a stale value when using nested txns
diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
@@ -5878,6 +5878,8 @@ mdb_cursor_set(MDB_cursor *mc, MDB_val *key, MDB_val *data,
 			} else
 				return MDB_NOTFOUND;
 		}
+	} else {
+		mc->mc_pg[0] = 0;
 	}
 
 	rc = mdb_page_search(mc, key, 0);

Original file line number	Diff line number	Diff line change
`@@ -5878,6 +5878,8 @@ mdb_cursor_set(MDB_cursor mc, MDB_val key, MDB_val *data,`
`5878`	`5878`	`} else`
`5879`	`5879`	`return MDB_NOTFOUND;`
`5880`	`5880`	`}`
	`5881`	`+ } else {`
	`5882`	`+ mc->mc_pg[0] = 0;`
`5881`	`5883`	`}`
`5882`	`5884`
`5883`	`5885`	`rc = mdb_page_search(mc, key, 0);`