diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -28,6 +28,7 @@
     hex,
     nullid,
     nullrev,
+    wdirfilenodeids,
     wdirhex,
     wdirid,
     wdirrev,
@@ -780,7 +781,7 @@
             raise
         except RevlogError:
             # parsers.c radix tree lookup failed
-            if node == wdirid:
+            if node == wdirid or node in wdirfilenodeids:
                 raise error.WdirUnsupported
             raise LookupError(node, self.indexfile, _('no node'))
         except KeyError:
@@ -796,7 +797,7 @@
                 if v == node:
                     self._nodepos = r - 1
                     return r
-            if node == wdirid:
+            if node == wdirid or node in wdirfilenodeids:
                 raise error.WdirUnsupported
             raise LookupError(node, self.indexfile, _('no node'))
 
@@ -1409,6 +1410,7 @@
                 pass
 
     def _partialmatch(self, id):
+        # we don't care wdirfilenodeids as they should be always full hash
         maybewdir = wdirhex.startswith(id)
         try:
             partial = self.index.partialmatch(id)
@@ -2082,7 +2084,7 @@
         if node == nullid:
             raise RevlogError(_("%s: attempt to add null revision") %
                               (self.indexfile))
-        if node == wdirid:
+        if node == wdirid or node in wdirfilenodeids:
             raise RevlogError(_("%s: attempt to add wdir revision") %
                               (self.indexfile))
 
diff --git a/tests/test-grep.t b/tests/test-grep.t
--- a/tests/test-grep.t
+++ b/tests/test-grep.t
@@ -245,7 +245,7 @@
   $ hg stat
   M port2
   $ hg grep -r 'wdir()' port
-  abort: data/port2.i@303030303030: no node!
+  abort: working directory revision cannot be specified
   [255]
 
   $ cd ..