Fix trivial crasher and downgrade an error to warning (to match GCC).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51976 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index efef3fc..795e356 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -406,13 +406,13 @@
/// Check that class of this category is already completely declared.
if (!IDecl || IDecl->isForwardDecl())
Diag(ClassLoc, diag::err_undef_interface, ClassName->getName());
- else {
+ else if (CategoryName) {
/// Check for duplicate interface declaration for this category
ObjCCategoryDecl *CDeclChain;
for (CDeclChain = IDecl->getCategoryList(); CDeclChain;
CDeclChain = CDeclChain->getNextClassCategory()) {
if (CDeclChain->getIdentifier() == CategoryName) {
- Diag(CategoryLoc, diag::err_dup_category_def, ClassName->getName(),
+ Diag(CategoryLoc, diag::warn_dup_category_def, ClassName->getName(),
CategoryName->getName());
break;
}