Fix to PR15826 - clang hits assert in clang::ASTContext::getASTRecordLayout.

llvm-svn: 185446
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 2d40f15..8e86389 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -10483,7 +10483,8 @@
     Tag->setTopLevelDeclInObjCContainer();
 
   // Notify the consumer that we've defined a tag.
-  Consumer.HandleTagDeclDefinition(Tag);
+  if (!Tag->isInvalidDecl())
+    Consumer.HandleTagDeclDefinition(Tag);
 }
 
 void Sema::ActOnObjCContainerFinishDefinition() {