3 files changed, 10 insertions, 0 deletions
diff --git a/src/backup.c b/src/backup.c
index 893a40e4d..bdf96bd8e 100644
--- a/src/backup.c
+++ b/src/backup.c
@@ -704,6 +704,8 @@ int sqlite3BtreeCopyFile(Btree *pTo, Btree *pFrom){
   rc = sqlite3_backup_finish(&b);
   if( rc==SQLITE_OK ){
     pTo->pBt->pageSizeFixed = 0;
+  }else{
+    sqlite3PagerClearCache(sqlite3BtreePager(b.pDest));
   }
 
   assert( sqlite3BtreeIsInTrans(pTo)==0 );
diff --git a/src/pager.c b/src/pager.c
index 421a7094f..63dda3ddf 100644
--- a/src/pager.c
+++ b/src/pager.c
@@ -6836,6 +6836,13 @@ int sqlite3PagerCloseWal(Pager *pPager){
   return rc;
 }
 
+/*
+** Unless this is an in-memory or temporary database, clear the pager cache.
+*/
+void sqlite3PagerClearCache(Pager *pPager){
+  if( !MEMDB && pPager->tempFile==0 ) pager_reset(pPager);
+}
+
 #ifdef SQLITE_HAS_CODEC
 /*
 ** This function is called by the wal module when writing page content
diff --git a/src/pager.h b/src/pager.h
index 540557248..e36e6c2e8 100644
--- a/src/pager.h
+++ b/src/pager.h
@@ -156,6 +156,7 @@ int sqlite3PagerNosync(Pager*);
 void *sqlite3PagerTempSpace(Pager*);
 int sqlite3PagerIsMemdb(Pager*);
 void sqlite3PagerCacheStat(Pager *, int, int, int *);
+void sqlite3PagerClearCache(Pager *);
 
 /* Functions used to truncate the database file. */
 void sqlite3PagerTruncateImage(Pager*,Pgno);