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-rw-r--r--pym/portage/dep/__init__.py6
1 files changed, 4 insertions, 2 deletions
diff --git a/pym/portage/dep/__init__.py b/pym/portage/dep/__init__.py
index a8d05f1f7..a92b481d1 100644
--- a/pym/portage/dep/__init__.py
+++ b/pym/portage/dep/__init__.py
@@ -2145,8 +2145,10 @@ def check_required_use(required_use, use, iuse_match):
is_negated = False
if not flag or not iuse_match(flag):
- raise InvalidDependString(
- _("malformed syntax: '%s'") % required_use)
+ msg = _("USE flag '%s' is not in IUSE") \
+ % (flag,)
+ e = InvalidData(msg, category='IUSE.missing')
+ raise InvalidDependString(msg, errors=(e,))
return (flag in use and not is_negated) or \
(flag not in use and is_negated)