r181846 - Don't mark a type specifier as "owned" if there is no declaration to own.

[Douglas Gregor]

Author: dgregor
Date: Tue May 14 18:22:32 2013
New Revision: 181846

URL: http://llvm.org/viewvc/llvm-project?rev=181846&view=rev
Log:
Don't mark a type specifier as "owned" if there is no declaration to own.

This simplifies error recovery elsewhere, eliminating the crash in
<rdar://problem/13853540>.

Modified:
    cfe/trunk/lib/Sema/DeclSpec.cpp
    cfe/trunk/test/SemaCXX/nested-name-spec.cpp

Modified: cfe/trunk/lib/Sema/DeclSpec.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/DeclSpec.cpp?rev=181846&r1=181845&r2=181846&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/DeclSpec.cpp (original)
+++ cfe/trunk/lib/Sema/DeclSpec.cpp Tue May 14 18:22:32 2013
@@ -651,7 +651,7 @@ bool DeclSpec::SetTypeSpecType(TST T, So
   DeclRep = Rep;
   TSTLoc = TagKwLoc;
   TSTNameLoc = TagNameLoc;
-  TypeSpecOwned = Owned;
+  TypeSpecOwned = Owned && Rep != 0;
   return false;
 }
 

Modified: cfe/trunk/test/SemaCXX/nested-name-spec.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/nested-name-spec.cpp?rev=181846&r1=181845&r2=181846&view=diff
==============================================================================
--- cfe/trunk/test/SemaCXX/nested-name-spec.cpp (original)
+++ cfe/trunk/test/SemaCXX/nested-name-spec.cpp Tue May 14 18:22:32 2013
@@ -297,3 +297,13 @@ namespace NS {
 int foobar = a + longer_b; // expected-error {{use of undeclared identifier 'a'; did you mean 'NS::a'?}} \
                            // expected-error {{use of undeclared identifier 'longer_b'; did you mean 'NS::longer_b'?}}
 }
+
+// <rdar://problem/13853540>
+namespace N {
+  struct X { };
+  namespace N {
+    struct Foo {
+      struct N::X *foo(); // expected-error{{no struct named 'X' in namespace 'N::N'}}
+    };
+  }
+}