Index: src/test_vfs.c ================================================================== --- src/test_vfs.c +++ src/test_vfs.c @@ -538,10 +538,11 @@ pFd->pShm = 0; pFd->pShmId = 0; pFd->zFilename = zName; pFd->pVfs = pVfs; pFd->pReal = (sqlite3_file *)&pFd[1]; + memset(pTestfile, 0, sizeof(TestvfsFile)); pTestfile->pFd = pFd; /* Evaluate the Tcl script: ** ** SCRIPT xOpen FILENAME