As Eli pointed out, it is possible that a namespace lookup is ambiguous!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67932 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/namespace-alias.cpp b/test/SemaCXX/namespace-alias.cpp
index 7d46d08..b05db5f 100644
--- a/test/SemaCXX/namespace-alias.cpp
+++ b/test/SemaCXX/namespace-alias.cpp
@@ -14,3 +14,10 @@
namespace D = i; // expected-error {{expected namespace name}}
namespace E = N::Foo; // expected-error {{expected namespace name}}
+
+namespace F {
+ namespace A { namespace B { } } // expected-note {{candidate found by name lookup is 'F::A::B'}}
+ namespace B { } // expected-note {{candidate found by name lookup is 'F::B'}}
+ using namespace A;
+ namespace D = B; // expected-error {{reference to 'B' is ambiguous}}
+}