diff --git a/dev-util/mercurial/files/mercurial-1.1.2-wsgi.patch~ b/dev-util/mercurial/files/mercurial-1.1.2-wsgi.patch~
new file mode 100644
--- /dev/null
+++ b/dev-util/mercurial/files/mercurial-1.1.2-wsgi.patch~
@@ -0,0 +1,20 @@
+diff -r d90d83ebea9e mercurial/ui.py
+--- a/mercurial/ui.py   Tue Jun 03 12:10:14 2008 +0200
++++ b/mercurial/ui.py   Sat Jun 07 22:58:36 2008 -0400
+@@ -385,12 +385,14 @@
+ 
+     def write_err(self, *args):
+         try:
+-            if not sys.stdout.closed: sys.stdout.flush()
++            try: sys.stdout.flush()
++            except: pass
+             for a in args:
+                 sys.stderr.write(str(a))
+             # stderr may be buffered under win32 when redirected to files,
+             # including stdout.
+-            if not sys.stderr.closed: sys.stderr.flush()
++            try: sys.stderr.flush()
++            except: pass
+         except IOError, inst:
+             if inst.errno != errno.EPIPE:
+                 raise