Skip local variables that are optimized out for 'cy exec' (in case user didn't...

Skip local variables that are optimized out for 'cy exec' (in case user didn't build with Cython's build_ext)

Cython/Debugger/libcython.py

@@ -1141,6 +1141,14 @@ class CyExec(CythonCommand, libpython.PyExec):
             if (cyvar.type == PythonObject and 
                 self.is_initialized(cython_func, name)):
                 
+                try:
+                    val = gdb.parse_and_eval(cyvar.cname)
+                except RuntimeError:
+                    continue
+                else:
+                    if val.is_optimized_out:
+                        continue
+                
                 pystringp = executor.alloc_pystring(name)
                 code = '''
                     PyDict_SetItem(