[lldb] Fix crash missing MSInheritanceAttr on CXXRecordDecl with DWARF on Windows

lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp

@@ -2771,6 +2771,9 @@ static bool GetCompleteQualType(clang::ASTContext *ast,
         ast, llvm::cast<clang::AttributedType>(qual_type)->getModifiedType(),
         allow_completion);
 
+  case clang::Type::MemberPointer:
+    return !qual_type.getTypePtr()->isIncompleteType();
+
   default:
     break;
   }

lldb/test/Shell/SymbolFile/DWARF/x86/ms-abi.cpp

@@ -0,0 +1,45 @@
+// REQUIRES: lld
+
+// Check that we don't crash on variables without MSInheritanceAttr
+
+// RUN: %clang -c --target=x86_64-windows-msvc -gdwarf %s -o %t.obj
+// RUN: lld-link /out:%t.exe %t.obj /nodefaultlib /entry:main /debug
+// RUN: %lldb -f %t.exe -b -o "target variable mp1 mp2 mp3 mp4 mp5 mp6 mp7 mp8 mp9"
+
+class SI {
+  int si;
+};
+struct SI2 {
+  int si2;
+};
+class MI : SI, SI2 {
+  int mi;
+};
+class MI2 : MI {
+  int mi2;
+};
+class VI : virtual MI {
+  int vi;
+};
+class VI2 : virtual SI, virtual SI2 {
+  int vi;
+};
+class /* __unspecified_inheritance*/ UI;
+
+typedef void (SI::*SITYPE)();
+typedef void (MI::*MITYPE)();
+typedef void (MI2::*MI2TYPE)();
+typedef void (VI::*VITYPE)();
+typedef void (VI2::*VI2TYPE)();
+typedef void (UI::*UITYPE)();
+SITYPE mp1 = nullptr;
+MITYPE mp2 = nullptr;
+MI2TYPE mp3 = nullptr;
+VITYPE mp4 = nullptr;
+VI2TYPE mp5 = nullptr;
+UITYPE mp6 = nullptr;
+MITYPE *mp7 = nullptr;
+VI2TYPE *mp8 = nullptr;
+int SI::*mp9 = nullptr;
+
+int main() {}