[PATCH] D42588: [index] Fix crash when indexing a C++14 PCH/module related to TemplateTemplateParmDecls of alias templates

[Phabricator via Phabricator via cfe-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL323549: [index] Fix crash when indexing a C++14 PCH/module 
related to… (authored by akirtzidis, committed by ).
Herald added a subscriber: llvm-commits.

Changed prior to commit:
  https://reviews.llvm.org/D42588?vs=131620=131629#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D42588

Files:
  cfe/trunk/lib/Index/IndexDecl.cpp
  cfe/trunk/lib/Serialization/ASTWriter.cpp
  cfe/trunk/test/Index/Core/index-pch.cpp


Index: cfe/trunk/lib/Serialization/ASTWriter.cpp
===
--- cfe/trunk/lib/Serialization/ASTWriter.cpp
+++ cfe/trunk/lib/Serialization/ASTWriter.cpp
@@ -5537,7 +5537,9 @@
 return;
   // FIXME: ParmVarDecls that are part of a function type of a parameter of
   // a function/objc method, should not have TU as lexical context.
-  if (isa(D))
+  // TemplateTemplateParmDecls that are part of an alias template, should not
+  // have TU as lexical context.
+  if (isa(D) || isa(D))
 return;
 
   SourceManager  = Context->getSourceManager();
Index: cfe/trunk/lib/Index/IndexDecl.cpp
===
--- cfe/trunk/lib/Index/IndexDecl.cpp
+++ cfe/trunk/lib/Index/IndexDecl.cpp
@@ -664,8 +664,11 @@
 
   bool VisitTemplateDecl(const TemplateDecl *D) {
 
-// Index the default values for the template parameters.
 const NamedDecl *Parent = D->getTemplatedDecl();
+if (!Parent)
+  return true;
+
+// Index the default values for the template parameters.
 if (D->getTemplateParameters() &&
 shouldIndexTemplateParameterDefaultValue(Parent)) {
   const TemplateParameterList *Params = D->getTemplateParameters();
@@ -684,7 +687,7 @@
   }
 }
 
-return Visit(D->getTemplatedDecl());
+return Visit(Parent);
   }
 
   bool VisitFriendDecl(const FriendDecl *D) {
Index: cfe/trunk/test/Index/Core/index-pch.cpp
===
--- cfe/trunk/test/Index/Core/index-pch.cpp
+++ cfe/trunk/test/Index/Core/index-pch.cpp
@@ -0,0 +1,17 @@
+// RUN: c-index-test core -print-source-symbols -- %s -std=c++14 | FileCheck %s
+// RUN: %clang_cc1 -emit-pch %s -std=c++14 -o %t.pch
+// RUN: c-index-test core -print-source-symbols -module-file %t.pch | 
FileCheck %s
+
+// CHECK: [[@LINE+2]]:8 | struct(Gen)/C++ | DETECTOR | [[DETECTOR_USR:.*]] | 
{{.*}} | Def | rel: 0
+template  class _Op, 
class... _Args>
+struct DETECTOR {
+ using value_t = int;
+};
+
+struct nonesuch {};
+
+// CHECK: [[@LINE+4]]:9 | type-alias/C++ | is_detected
+// CHECK: [[@LINE+3]]:32 | struct(Gen)/C++ | DETECTOR | [[DETECTOR_USR]] | 
{{.*}} | Ref,RelCont | rel: 1
+// CHECK-NEXT: RelCont | is_detected
+template