acedSSGet crasch when not selecting an object

Samuel_A

I have a plugin that uses the following code: acedSSGet(_T(":$"), prompts, NULL, NULL, entres);

It allowes the user to select objects and that works fine unless you click outside an object. If you click somethere in empty space BricsCad crasch and gives following error:
"Unhandled exception at 0x00007FF9ED7EFF5A (ntdll.dll) in bricscad.exe: 0xC000041D"

Its_Alive

i've been using similar code for years with success.
its wrapped in a class but, you'll get the idea

AcDbObjectIdArray SelectionSet::Select()
{
    AcDbObjectIdArray m_ids;
    if (acedSSGet(m_mode, m_point1, m_point2, m_filter, m_ss) == RTNORM)
    {
        if (acedSSLength(m_ss, &m_length) == RTNORM)
        {
            if (auto es = acedGetCurrentSelectionSet(m_ids); es != eOk)
                acutPrintf(_T("\nSelection error  = %ls :"), acadErrorStatusText(es));
        }
    }
    return m_ids;
}

Samuel_A

It is more or less the same routine as I am using. It's the acedSSGet command that crasch If I click outside an object. When you click on empty space you get the selection rectangle and that is what you get when you click outside an object with acedSSGet so a selection rectangle crasch this command.
When I do the same in AutoCad it just show "0 entities selected" so it works in AutoCad.

Its_Alive

Are you using V22?
Sorry, I could not reproduce it with this code

    static void CArxTest_doit()
    {
        try
        {
            struct resbuf* filter = acutBuildList(RTDXF0, ACRX_T("POINT"), RTNONE);
            const ACHAR* prompt[] = { ACRX_T("\nSelect Points: "), ACRX_T("\nRemove Points: ") };
            const ACHAR* mode = ACRX_T(":$");
            ads_name ss = { 0L };

            AcDbObjectIdArray ids;
            if (acedSSGet(mode, prompt, NULL, filter, ss) == RTNORM)
            {
                auto es = acedGetCurrentSelectionSet(ids);
                if (es != eOk)
                    acutPrintf(_T("\nSelection error  = %ls :"), acadErrorStatusText(es));
                acutRelRb(filter);
                acedSSFree(ss);
            }
        }
        catch (...)
        {
            acutPrintf(_T("\nException in acedSSGet: "));
        }
    }

Samuel_A

Yes with V22. It crash in the acedSSGet command. If I set a breakpoint just after it I can see that I never reach that line, but entire BricsCad crash on the acedSSGet command when selecting "nothing" (click outside so the select box appear).

Samuel_A

I tried to add "try / catch" and that could capture the exception so now I can fix the crasch by just ignore it if catch trigger. So that is helpfull!