diff --git a/lldb/source/Symbol/ClangASTContext.cpp b/lldb/source/Symbol/ClangASTContext.cpp
--- a/lldb/source/Symbol/ClangASTContext.cpp
+++ b/lldb/source/Symbol/ClangASTContext.cpp
@@ -3601,7 +3601,7 @@
 }
 
 bool ClangASTContext::IsObjCClassType(const CompilerType &type) {
-  if (type) {
+  if (ClangUtil::IsClangType(type)) {
     clang::QualType qual_type(ClangUtil::GetCanonicalQualType(type));
 
     const clang::ObjCObjectPointerType *obj_pointer_type =
@@ -3886,7 +3886,7 @@
 
 bool ClangASTContext::IsObjCObjectPointerType(const CompilerType &type,
                                               CompilerType *class_type_ptr) {
-  if (!type)
+  if (!ClangUtil::IsClangType(type))
     return false;
 
   clang::QualType qual_type(ClangUtil::GetCanonicalQualType(type));
diff --git a/lldb/source/Symbol/ClangUtil.cpp b/lldb/source/Symbol/ClangUtil.cpp
--- a/lldb/source/Symbol/ClangUtil.cpp
+++ b/lldb/source/Symbol/ClangUtil.cpp
@@ -15,6 +15,10 @@
 using namespace lldb_private;
 
 bool ClangUtil::IsClangType(const CompilerType &ct) {
+  // Invalid types are never Clang types.
+  if (!ct)
+    return false;
+
   if (llvm::dyn_cast_or_null<ClangASTContext>(ct.GetTypeSystem()) == nullptr)
     return false;