From f8b359b00d0bf38674ce3f94e98bc2aaa3be9f45 Mon Sep 17 00:00:00 2001
From: Joe Mistachkin <sqlite@mistachkin.com>
Date: Thu, 9 Nov 2017 20:37:37 +0000
Subject: [PATCH] Add an assert() in the Win32 VFS.

---
 src/os_win.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/os_win.c b/src/os_win.c
index 05ae7e67db..aff48e25e9 100644
--- a/src/os_win.c
+++ b/src/os_win.c
@@ -3885,6 +3885,7 @@ static int winGetShmDmsLockType(
       if( winIsLockConflict(lastErrno) ){
         if( pLockType ) *pLockType = WINSHM_WRLCK;
       }else if( winIsLockMissing(lastErrno) ){
+        assert( bReadOnly );
         if( pLockType ) *pLockType = WINSHM_UNLCK;
       }else{
         return SQLITE_IOERR_READ;
-- 
2.11.4.GIT