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-rw-r--r--ext/misc/memvfs.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/misc/memvfs.c b/ext/misc/memvfs.c
index 27a61c35e..83fc9468e 100644
--- a/ext/misc/memvfs.c
+++ b/ext/misc/memvfs.c
@@ -559,6 +559,7 @@ int sqlite3_memvfs_init(
int rc = SQLITE_OK;
SQLITE_EXTENSION_INIT2(pApi);
mem_vfs.pAppData = sqlite3_vfs_find(0);
+ if( mem_vfs.pAppData==0 ) return SQLITE_ERROR;
mem_vfs.szOsFile = sizeof(MemFile);
rc = sqlite3_vfs_register(&mem_vfs, 1);
#ifdef MEMVFS_TEST