From 7d92c18b49fabc98f75ca55c51acd2b849c39f5c Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Thu, 5 Aug 2010 16:02:25 -0700
Subject: [PATCH] Bug #331271 - Fix USE_EXPAND wildcards so that the
 USE="linguas_en_US -linguas_*" case is handled correctly.

---
 pym/portage/package/ebuild/config.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pym/portage/package/ebuild/config.py b/pym/portage/package/ebuild/config.py
index 7266a6366..bfff1cc44 100644
--- a/pym/portage/package/ebuild/config.py
+++ b/pym/portage/package/ebuild/config.py
@@ -2292,6 +2292,12 @@ class config(object):
 						continue
 
 				if x[0] == "-":
+					if x[-2:] == '_*':
+						prefix = x[1:-1]
+						prefix_len = len(prefix)
+						myflags.difference_update(
+							[y for y in myflags if \
+							y[:prefix_len] == prefix])
 					myflags.discard(x[1:])
 					continue
 
-- 
2.26.2