Update lldb/source/Plugins/Process/mach-core/ThreadMachCore.cpp

Co-authored-by: Jonas Devlieghere <[email protected]>

Author: jasonmolenda

lldb/source/Plugins/Process/mach-core/ThreadMachCore.cpp

@@ -88,6 +88,7 @@ ThreadMachCore::CreateRegisterContextForFrame(StackFrame *frame) {
     return m_thread_reg_ctx_sp;
 
   ProcessSP process_sp(GetProcess());
+  assert(process_sp);
 
   ObjectFile *core_objfile =
       static_cast<ProcessMachCore *>(process_sp.get())->GetCoreObjectFile();