Add assert() statements to help verify the overflow page cache.

FossilOrigin-Name: 0ebc65481f4a3e7974558adea51c620a025bc0e76c0a139e549b56c5abe0cabb

1 files changed, 4 insertions, 0 deletions

diff --git a/src/btree.c b/src/btree.c
index 91c9e4fb5..756ec942c 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -5143,6 +5143,10 @@ static int accessPayload(
       memset(pCur->aOverflow, 0, nOvfl*sizeof(Pgno));
       pCur->curFlags |= BTCF_ValidOvfl;
     }else{
+      /* Sanity check the validity of the overflow page cache */
+      assert( pCur->aOverflow[0]==nextPage || pCur->aOverflow[0]==0 );
+      assert( pCur->aOverflow[0]!=0 || pCur->aOverflow[offset/ovflSize]==0 );
+
       /* If the overflow page-list cache has been allocated and the
       ** entry for the first required overflow page is valid, skip
       ** directly to it.