1 files changed, 33 insertions, 0 deletions
diff --git a/clang/unittests/AST/ASTImporterTest.cpp b/clang/unittests/AST/ASTImporterTest.cpp
index a4c823008d9..02020e6fa23 100644
--- a/clang/unittests/AST/ASTImporterTest.cpp
+++ b/clang/unittests/AST/ASTImporterTest.cpp
@@ -1797,5 +1797,38 @@ TEST(ImportExpr, UnresolvedMemberExpr) {
                  compoundStmt(has(callExpr(has(unresolvedMemberExpr())))))))));
 }
 
+struct DeclContextTest : ASTImporterTestBase {};
+
+TEST_P(DeclContextTest, removeDeclOfClassTemplateSpecialization) {
+  Decl *TU = getTuDecl(
+      R"(
+      namespace NS {
+
+      template <typename T>
+      struct S {};
+      template struct S<int>;
+
+      inline namespace INS {
+        template <typename T>
+        struct S {};
+        template struct S<int>;
+      }
+
+      }
+      )", Lang_CXX11, "input0.cc");
+  auto *NS = FirstDeclMatcher<NamespaceDecl>().match(
+      TU, namespaceDecl());
+  auto *Spec = FirstDeclMatcher<ClassTemplateSpecializationDecl>().match(
+      TU, classTemplateSpecializationDecl());
+  ASSERT_TRUE(NS->containsDecl(Spec));
+
+  NS->removeDecl(Spec);
+  EXPECT_FALSE(NS->containsDecl(Spec));
+}
+
+INSTANTIATE_TEST_CASE_P(
+    ParameterizedTests, DeclContextTest,
+    ::testing::Values(ArgVector(), ArgVector{"-fdelayed-template-parsing"}),);
+
 } // end namespace ast_matchers
 } // end namespace clang