From 8c9bf999aa40ab6077b958b5edcf587b9d76ce24 Mon Sep 17 00:00:00 2001
From: Jan Korous <jkorous@apple.com>
Date: Tue, 10 Oct 2017 21:09:49 +0000
Subject: [PATCH] Fix indexer crash for default template template parameter
 value

rdar://33058798

Differential Revision: https://reviews.llvm.org/D38755

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@315367 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Index/IndexDecl.cpp                      | 3 +--
 test/Index/index-template-template-param.cpp | 7 +++++++
 2 files changed, 8 insertions(+), 2 deletions(-)
 create mode 100644 test/Index/index-template-template-param.cpp

diff --git a/lib/Index/IndexDecl.cpp b/lib/Index/IndexDecl.cpp
index ee28ef737d..2704e6da95 100644
--- a/lib/Index/IndexDecl.cpp
+++ b/lib/Index/IndexDecl.cpp
@@ -666,7 +666,6 @@ public:
   }
 
   bool VisitTemplateDecl(const TemplateDecl *D) {
-    // FIXME: Template parameters.
 
     // Index the default values for the template parameters.
     const NamedDecl *Parent = D->getTemplatedDecl();
@@ -683,7 +682,7 @@ public:
         } else if (const auto *TTPD = dyn_cast<TemplateTemplateParmDecl>(TP)) {
           if (TTPD->hasDefaultArgument())
             handleTemplateArgumentLoc(TTPD->getDefaultArgument(), Parent,
-                                      /*DC=*/nullptr);
+                                      TP->getLexicalDeclContext());
         }
       }
     }
diff --git a/test/Index/index-template-template-param.cpp b/test/Index/index-template-template-param.cpp
new file mode 100644
index 0000000000..af1c4634ad
--- /dev/null
+++ b/test/Index/index-template-template-param.cpp
@@ -0,0 +1,7 @@
+// RUN: c-index-test -index-file %s -x objective-c++ | FileCheck %s
+
+template <typename T> class Template1 {};
+
+template <template <class> class TMPL = Template1> class Template2;
+
+// CHECK: [indexEntityReference]: kind: c++-class-template | name: Template1 |
-- 
2.40.0