diff --git a/django/core/handlers/wsgi.py b/django/core/handlers/wsgi.py
index 7541a5fd9dd8b..5120ef6637f40 100644
--- a/django/core/handlers/wsgi.py
+++ b/django/core/handlers/wsgi.py
@@ -55,9 +55,30 @@ def __init__(self, environ):
 
     def __repr__(self):
         from pprint import pformat
-        return '<DjangoRequest\nGET:%s,\nPOST:%s,\nCOOKIES:%s,\nMETA:%s>' % \
-            (pformat(self.GET), pformat(self.POST), pformat(self.COOKIES),
-            pformat(self.META))
+        # Since this is called as part of error handling, we need to be very
+        # robust against potentially malformed input.
+        try:
+            get = pformat(self.GET)
+        except:
+            get = '<could not parse>'
+        try:
+            post = pformat(self.POST)
+        except:
+            post = '<could not parse>'
+        try:
+            cookies = pformat(self.COOKIES)
+        except:
+            cookies = '<could not parse>'
+        try:
+            meta = pformat(self.META)
+        except:
+            meta = '<could not parse>'
+        try:
+            user = self.user
+        except:
+            user = '<could not parse>'
+        return '<DjangoRequest\npath:%s,\nGET:%s,\nPOST:%s,\nCOOKIES:%s,\nMETA:%s,\nuser:%s>' % \
+               (self.path, get, post, cookies, meta, user)
 
     def get_full_path(self):
         return '%s%s' % (self.path, self.environ['QUERY_STRING'] and ('?' + self.environ['QUERY_STRING']) or '')