The BTree mutex must be held when calling sqlite3BtreeLastPage(). This

check-in fixes a bug introduced by [cf8b99e17872c054].

FossilOrigin-Name: e6c30ee52c5cdc193804cec63374d558b45e4d67fc6bde58771ca78485ca0acf

1 files changed, 2 insertions, 0 deletions

diff --git a/src/dbpage.c b/src/dbpage.c
index 3bb18b677..74f345570 100644
--- a/src/dbpage.c
+++ b/src/dbpage.c
@@ -428,9 +428,11 @@ static int dbpageSync(sqlite3_vtab *pVtab){
   if( pTab->pgnoTrunc>0 ){
     Btree *pBt = pTab->db->aDb[pTab->iDbTrunc].pBt;
     Pager *pPager = sqlite3BtreePager(pBt);
+    sqlite3BtreeEnter(pBt);
     if( pTab->pgnoTrunc<sqlite3BtreeLastPage(pBt) ){
       sqlite3PagerTruncateImage(pPager, pTab->pgnoTrunc);
     }
+    sqlite3BtreeLeave(pBt);
   }
   pTab->pgnoTrunc = 0;
   return SQLITE_OK;