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-rw-r--r--src/interp/category.boot3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/interp/category.boot b/src/interp/category.boot
index 16b7720d..c5289d51 100644
--- a/src/interp/category.boot
+++ b/src/interp/category.boot
@@ -1,6 +1,6 @@
-- Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
--- Copyright (C) 2007-2011, Gabriel Dos Reis.
+-- Copyright (C) 2007-2012, Gabriel Dos Reis.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
@@ -473,6 +473,7 @@ JoinInner(l,$e) ==
mkCategory("domain",sigl,attl,globalDomains,bufferToVector principal)
Join(:l) ==
+ l = nil => mkCategory("domain",nil,nil,nil,nil)
e :=
null $e or $InteractiveMode => $CategoryFrame
$e