Declarator::clear(): Null out variable after it's been deleted.

This avoids a double free (which is good:-)

Bug submitted by Eli.

llvm-svn: 46105

2 files changed, 4 insertions, 0 deletions

diff --git a/clang/include/clang/Parse/DeclSpec.h b/clang/include/clang/Parse/DeclSpec.h
index bf7920fa2d2..307959f83a4 100644
--- a/clang/include/clang/Parse/DeclSpec.h
+++ b/clang/include/clang/Parse/DeclSpec.h
@@ -566,6 +566,7 @@ public:
     }
     DeclTypeInfo.clear();
     delete AttrList;
+    AttrList = 0;
   }
   
   /// mayOmitIdentifier - Return true if the identifier is either optional or
diff --git a/clang/test/Sema/declspec.c b/clang/test/Sema/declspec.c
index d9e02ec42e1..05f492d67ac 100644
--- a/clang/test/Sema/declspec.c
+++ b/clang/test/Sema/declspec.c
@@ -3,3 +3,6 @@ typedef char T[4];
 
 T foo(int n, int m) {  }  // expected-error {{cannot return array or function}}
 
+void foof(const char *, ...) __attribute__((__format__(__printf__, 1, 2))), barf (void);
+
+