From 333e6ca9a5a38d756cac1e64669b4b4a5c65e8e8 Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Wed, 2 Dec 2015 15:44:39 +0000
Subject: [PATCH] Remove an unreachable branch from the unixMapfile() routine
 of the unix VFS.

FossilOrigin-Name: b50f67bc46e65fe4e51667d48b4add58706a9443
---
 manifest      | 12 ++++++------
 manifest.uuid |  2 +-
 src/os_unix.c |  8 +++-----
 3 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/manifest b/manifest
index 23275e1740..a287e3b468 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Minor\ssimplifications\sto\sthe\sunix\sVFS.
-D 2015-12-02T13:11:03.174
+C Remove\san\sunreachable\sbranch\sfrom\sthe\sunixMapfile()\sroutine\sof\sthe\sunix\sVFS.
+D 2015-12-02T15:44:39.206
 F Makefile.in 23d9a63484a383fc64951b25ef44067930f98dc6
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc e8fdca1cb89a1b58b5f4d3a130ea9a3d28cb314d
@@ -323,7 +323,7 @@ F src/os.c 8fd25588eeba74068d41102d26810e216999b6c8
 F src/os.h 3e57a24e2794a94d3cf2342c6d9a884888cd96bf
 F src/os_common.h abdb9a191a367793268fe553d25bab894e986a0e
 F src/os_setup.h c9d4553b5aaa6f73391448b265b89bed0b890faa
-F src/os_unix.c 2b65298be9db161beb0e3ffadc9be0080d51c320
+F src/os_unix.c b2482c403890fc94ee6810a939c667911d871656
 F src/os_win.c 386fba30419e8458b13209781c2af5590eab2811
 F src/os_win.h eb7a47aa17b26b77eb97e4823f20a00b8bda12ca
 F src/pager.c f92aacd5216d8815136c9e0190041783c602641a
@@ -1408,7 +1408,7 @@ F tool/vdbe_profile.tcl 246d0da094856d72d2c12efec03250d71639d19f
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P f64ea8a052af9790d5e6987cbd5e81d77da6f172
-R 7335e7d7ad4ea5951ac863300cf3bdc9
+P 2f13c16b45685ec6850cbd9da79e8198bad6a491
+R abab3e669867554a3d4200296f7779a0
 U drh
-Z 5e48ed834d343e9f2a57065e0ab37833
+Z cde83eb7aba3982fd2548e9f5c9718be
diff --git a/manifest.uuid b/manifest.uuid
index 4a79fe8bad..9a8daa1e72 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-2f13c16b45685ec6850cbd9da79e8198bad6a491
\ No newline at end of file
+b50f67bc46e65fe4e51667d48b4add58706a9443
\ No newline at end of file
diff --git a/src/os_unix.c b/src/os_unix.c
index 00602c6b82..31e3215b8a 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -4768,6 +4768,7 @@ static void unixRemapfile(
 */
 static int unixMapfile(unixFile *pFd, i64 nMap){
   assert( nMap>=0 || pFd->nFetchOut==0 );
+  assert( nMap>0 || (pFd->mmapSize==0 && pFd->pMapRegion==0) );
   if( pFd->nFetchOut>0 ) return SQLITE_OK;
 
   if( nMap<0 ){
@@ -4781,12 +4782,9 @@ static int unixMapfile(unixFile *pFd, i64 nMap){
     nMap = pFd->mmapSizeMax;
   }
 
+  assert( nMap>0 || (pFd->mmapSize==0 && pFd->pMapRegion==0) );
   if( nMap!=pFd->mmapSize ){
-    if( nMap>0 ){
-      unixRemapfile(pFd, nMap);
-    }else{
-      unixUnmapfile(pFd);
-    }
+    unixRemapfile(pFd, nMap);
   }
 
   return SQLITE_OK;
-- 
2.47.2