commit df3e957d37346dff9b8c6214f5ed827f85fe3ad4
author Douglas Gregor <doug.gregor@gmail.com> Sun May 10 22:59:12 2009 +0000
committer Douglas Gregor <doug.gregor@gmail.com> Sun May 10 22:59:12 2009 +0000
tree 5e1dc247814af08bd18af0bb4e081ccf0b5561da
parent 9054f9878dbe2b1b8384c951ad07759d9de9dc8c

The canonical declaration of a NULL declaration is NULL

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71409 91177308-0d34-0410-b5e6-96231b3b80d8

lib/AST/ASTContext.cpp

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index f9d648b..52eadef 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -1704,6 +1704,9 @@
 }
 
 Decl *ASTContext::getCanonicalDecl(Decl *D) {
+  if (!D)
+    return 0;
+
   if (TagDecl *Tag = dyn_cast<TagDecl>(D)) {
     QualType T = getTagDeclType(Tag);
     return cast<TagDecl>(cast<TagType>(T.getTypePtr()->CanonicalType)