================
@@ -0,0 +1,178 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+
+namespace gh98199_0{
+inline namespace A {
+ namespace N {}
+}
+inline namespace B {
+ namespace N {}
+}
+namespace N { // expected-error {{reference to 'N' is ambiguous}}
+ // expected-note@-6 {{candidate found by name lookup is 'gh98199_0::A::N'}}
+ // expected-note@-4 {{candidate found by name lookup is 'gh98199_0::B::N'}}
+ void f();
+}
+}
+
+namespace gh98199_1{
+inline namespace A{
+ inline namespace A_ { namespace N {} }
+ inline namespace A__ { namespace N {} }
+}
+
+inline namespace B{
+ inline namespace B_ { namespace N {} }
+ inline namespace B__ { namespace N {} }
+}
+
+namespace N{ // expected-error {{reference to 'N' is ambiguous}}
+ // expected-note@-10 {{candidate found by name lookup is
'gh98199_1::A_::N'}}
+ // expected-note@-10 {{candidate found by name lookup is
'gh98199_1::A__::N'}}
+ // expected-note@-7 {{candidate found by name lookup is
'gh98199_1::B_::N'}}
+ // expected-note@-7 {{candidate found by name lookup is
'gh98199_1::B__::N'}}
+}
+}
+
+namespace gh98199_2{
+namespace A{ namespace N{} }
+using namespace A;
+namespace N{} // no error
----------------
ChenMiaoi wrote:
why does LookupQualifiedName(R, CurContext->getRedeclContext()) find A::N
through an inline namespace at all — and why doesn’t it find using namespace
A;’s N (your _2/_3/_14 “no error” cases)?
https://github.com/llvm/llvm-project/pull/234689
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