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, 1 insertions, 1 deletions

diff --git a/contrib/llvm/tools/lldb/source/Interpreter/Options.cpp b/contrib/llvm/tools/lldb/source/Interpreter/Options.cpp
index 8d245cc..c6c66d8 100644
--- a/contrib/llvm/tools/lldb/source/Interpreter/Options.cpp
+++ b/contrib/llvm/tools/lldb/source/Interpreter/Options.cpp
@@ -952,7 +952,7 @@ Options::HandleOptionArgumentCompletion
 
             // If this is the "shlib" option and there was an argument provided,
             // restrict it to that shared library.
-            if (strcmp(cur_opt_name, "shlib") == 0 && cur_arg_pos != -1)
+            if (cur_opt_name && strcmp(cur_opt_name, "shlib") == 0 && cur_arg_pos != -1)
             {
                 const char *module_name = input.GetArgumentAtIndex(cur_arg_pos);
                 if (module_name)