Add test case for issue microsoft#1301, need to backport to pydevd

src/ptvsd/_vendored/pydevd/_pydevd_bundle/pydevd_resolver.py

@@ -291,7 +291,6 @@ def get_contents_debug_adapter_protocol(self, dct, fmt=None):
  ret.append((key_as_str, val, '[%s]' % (eval_key_str,)))
  if i > MAX_ITEMS_TO_HANDLE:
  ret.append((TOO_LARGE_ATTR, TOO_LARGE_MSG, None))
-
  break
 
  ret.append(('__len__', len(dct), partial(_apply_evaluate_name, evaluate_name='len(%s)')))

src/ptvsd/_vendored/pydevd/tests_python/test_suspended_frames_manager.py

@@ -1,5 +1,6 @@
 import sys
 from _pydevd_bundle.pydevd_constants import int_types
+from _pydevd_bundle.pydevd_resolver import MAX_ITEMS_TO_HANDLE
 
 
 def get_frame():
@@ -70,3 +71,30 @@ def test_suspended_frames_manager():
  '33': {'name': '33', 'value': "[1]", 'type': 'list', 'evaluateName': 'var3[33]'},
  '__len__': {'name': '__len__', 'value': '1', 'type': 'int', 'evaluateName': 'len(var3)'}
  })
+
+
+def get_large_frame():
+ lst = {}
+ for idx in range(0, MAX_ITEMS_TO_HANDLE + 1):
+ lst[idx] = (1)
+ return sys._getframe()
+
+def test_get_child_variables():
+ from _pydevd_bundle.pydevd_suspended_frames import SuspendedFramesManager
+ suspended_frames_manager = SuspendedFramesManager()
+ py_db = None
+ with suspended_frames_manager.track_frames(py_db) as tracker:
+ # : :type tracker: _FramesTracker
+ thread_id = 'thread1'
+ frame = get_large_frame()
+ tracker.track(thread_id, frame, frame_id_to_lineno={})
+
+ assert suspended_frames_manager.get_thread_id_for_variable_reference(id(frame)) == thread_id
+
+ variable = suspended_frames_manager.get_variable(id(frame))
+
+ for x in variable.get_children_variables():
+ try:
+ x.get_children_variables()
+ except:
+ raise AssertionError()