From bb437f82051670959ed022039e9d20de94087129 Mon Sep 17 00:00:00 2001
From: "svoj@mysql.com/april.(none)" <>
Date: Tue, 5 Jun 2007 03:16:02 +0500
Subject: [PATCH] BUG#27141 - Calling tell(-1) under Windows causes assertion
 failure in Debug mode

Original problem was fixed by Magnus (see BUG25807).

Currently only windows debug build causes assertion failure. This patch assures
that my_tell gets correct file descriptor on any platform by DBUG_ASSERT macro.
---
 mysys/my_seek.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mysys/my_seek.c b/mysys/my_seek.c
index 3d415400aa2..5c1a6c44b6f 100644
--- a/mysys/my_seek.c
+++ b/mysys/my_seek.c
@@ -88,6 +88,7 @@ my_off_t my_tell(File fd, myf MyFlags __attribute__((unused)))
   os_off_t pos;
   DBUG_ENTER("my_tell");
   DBUG_PRINT("my",("Fd: %d  MyFlags: %d",fd, MyFlags));
+  DBUG_ASSERT(fd >= 0);
 #ifdef HAVE_TELL
   pos=tell(fd);
 #else