Update LLDB snapshot to upstream r201577

Highlights include:

- Improvements to the remote GDB protocol client
  (r196610, r197579, r197857, r200072)

- Bug fixes for big-endian targets
  (r196808)

- Initial support for libdispatch (GCD) queues in the debuggee
  (r197190)

- Add "step-avoid-libraries" setting
  (r199943)

- IO subsystem improvements (including initial work on a curses gui)
  (r200263)

- Various bug fixes for memory leaks, LLDB segfaults, the C++ demangler,
  ELF core files, DWARF debug info, and others.

Sponsored by:	DARPA, AFRL

1 files changed, 7 insertions, 0 deletions

diff --git a/contrib/llvm/tools/lldb/source/Symbol/Variable.cpp b/contrib/llvm/tools/lldb/source/Symbol/Variable.cpp
index 7276e0a..36fe3b1 100644
--- a/contrib/llvm/tools/lldb/source/Symbol/Variable.cpp
+++ b/contrib/llvm/tools/lldb/source/Symbol/Variable.cpp
@@ -832,10 +832,17 @@ PrivateAutoComplete (StackFrame *frame,
                     
                     VariableList *variable_list = frame->GetVariableList(get_file_globals);
                     
+                    if (!variable_list)
+                        break;
+                    
                     const size_t num_variables = variable_list->GetSize();
                     for (size_t i=0; i<num_variables; ++i)
                     {
                         Variable *variable = variable_list->GetVariableAtIndex(i).get();
+                        
+                        if (!variable)
+                            continue;
+                        
                         const char *variable_name = variable->GetName().AsCString();
                         if (strstr(variable_name, token.c_str()) == variable_name)
                         {