A DESCRIPTION OF THE PROBLEM :
When I try to get UI element in PyCharm and its ancestors' information, sometimes wrong info could be returned: the indexInParent field in AccessibleContextInfo is -1.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Install PyCharm. This program is written in Java, so Java Access Bridge can be used to get UI element information of this program.
2. Write a C++ program to call functions in Java Access Bridge.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
1. Correct accessibility info could be collected, the indexInParent field in AccessibleContextInfo must not be -1.
ACTUAL -
1. Wrong accessibility info is collected, the indexInParent field in AccessibleContextInfo is -1.

---------- BEGIN SOURCE ----------
1. Here is part of C++ source code:
POINT point;
GetCursorPos(&point);
HWND h = WindowFromPoint(point);

if (!IsJavaWindow(h))
{
  return;
}

AccessibleContext root_ac;
long vmId;
if (!GetAccessibleContextFromHWND(h, &vmId, &root_ac))
{
  return;
}

AccessibleContext ac;

if (!GetAccessibleContextAt(vmId, root_ac, point.x, point.y, &ac))
{
  return;
}
AccessibleContextInfo info;

if (!GetAccessibleContextInfo(vmId, ac, &info))
{
  return;
}

OutputDebugStringW(L"------------------------------------\n");
AccessibleContext pAc;
while (ac)
{
  AccessibleContextInfo info;
  GetAccessibleContextInfo(vmId, ac, &info);

  HWND hwnd = getHWNDFromAccessibleContext(vmId, ac);
  char txt[256];
  sprintf_s(txt, "info = %d %d %d %d %d %d\n", info.childrenCount, info.indexInParent, info.x, info.y, info.width, info.height); // Sometimes the indexInParent field is -1.
  OutputDebugStringA(txt);

  pAc = GetAccessibleParentFromContext(vmId, ac);
  ac = pAc;
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Not known.