2 files changed, 10 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog
index d923a80..030a91f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-03-07  Eli Zaretskii  <eliz@gnu.org>
+
+	* function.c (func_shell): Don't close pipedes[1] if it is -1.
+	Fixes Savannah bug #20495.
+
 2008-09-30  Eli Zaretskii  <eliz@gnu.org>
 
 	* build_w32.bat (GCCBuild): Use "-gdwarf-2 -g3" instead of
diff --git a/function.c b/function.c
index 09edbad..10d3d6b 100644
--- a/function.c
+++ b/function.c
@@ -1687,8 +1687,11 @@ func_shell (char *o, char **argv, const char *funcname UNUSED)
       free (command_argv[0]);
       free (command_argv);
 
-      /* Close the write side of the pipe.  */
-      close (pipedes[1]);
+      /* Close the write side of the pipe.  We test for -1, since
+	 pipedes[1] is -1 on MS-Windows, and some versions of MS
+	 libraries barf when `close' is called with -1.  */
+      if (pipedes[1] >= 0)
+	close (pipedes[1]);
 #endif
 
       /* Set up and read from the pipe.  */