--- a/mercurial/minifileset.py	Tue Jan 23 21:29:45 2018 -0500
+++ b/mercurial/minifileset.py	Wed Jan 24 22:26:28 2018 -0500
@@ -30,7 +30,7 @@
             pl = len(p)
             f = lambda n, s: n.startswith(p) and (len(n) == pl or n[pl] == '/')
             return f
-        raise error.ParseError(_("unsupported file pattern"),
+        raise error.ParseError(_("unsupported file pattern: %s") % name,
                                hint=_('paths must be prefixed with "path:"'))
     elif op == 'or':
         func1 = _compile(tree[1])