Issue with Indexer and VirtualTree paint

[Jacek Laskowski 57]

 

I don't use Indexer on a daily basis, but I thought I would use it because I wanted to look for many things in the code quickly. I opened its window, indexed the project and started searching. But after hovering the mouse cursor over the name in the indexer window I get AV. This is related to the hint window, as shown in the log.

 

 

The error is repetitive, every hovering the cursor generates AV:

 

[5005FD90]{rtl260.bpl  } System.TObject.InheritsFrom (Line 18239, "System.pas" + 6) + $0
[134F6ABF]{mmx_bds20.dll} VirtualTrees.TBaseVirtualTree.GetDisplayRect (Line 26992, "VirtualTrees.pas" + 40) + $32
[50060298]{rtl260.bpl  } System.TMonitor.CheckOwningThread (Line 19020, "System.pas" + 2) + $0
[5005FDDF]{rtl260.bpl  } System.TObject.Dispatch (Line 18324, "System.pas" + 11) + $0
[50D15292]{vcl260.bpl  } Vcl.Controls.TControl.WndProc (Line 7420, "Vcl.Controls.pas" + 91) + $6
[0EC92198]{CnWizards_D103R.DLL} CnWizNotifier.TCnWizNotifierServices.DoMsgHook$qqrp20System.Classes.TListt1p6HWND__rx24Winapi.Messages.TMessage (Line 1948, "CnWizNotifier.pas" + 1) + $19
[0EC9224B]{CnWizards_D103R.DLL} CnWizNotifier.TCnWizNotifierServices.DoMsgHook$qqrp20System.Classes.TListt1p6HWND__rx24Winapi.Messages.TMessage (Line 1959, "CnWizNotifier.pas" + 12) + $15
[50060079]{rtl260.bpl  } System.@AfterConstruction (Line 18814, "System.pas" + 2) + $5
[50060308]{rtl260.bpl  } System.TMonitor.Destroy (Line 19042, "System.pas" + 0) + $0
[5005F98D]{rtl260.bpl  } System.TObject.CleanupInstance (Line 17680, "System.pas" + 37) + $0
[5005A264]{rtl260.bpl  } System.@FreeMem (Line 4839, "System.pas" + 20) + $0
[5005FBE2]{rtl260.bpl  } System.@IsClass (Line 17942, "System.pas" + 1) + $8
[13542CDE]{mmx_bds20.dll} MMSuperHints.TMMSuperHintWindow.GetObjectHint (Line 164, "MMSuperHints.pas" + 2) + $8
[13542BAD]{mmx_bds20.dll} MMSuperHints.TMMSuperHintWindow.GetHeaderAndDetails (Line 145, "MMSuperHints.pas" + 6) + $E
[0EC91F24]{CnWizards_D103R.DLL} CnWizNotifier.TCnWizNotifierServices.AppEventNotify$qqr32Cnwiznotifier.TCnWizAppEventTypepv (Line 1854, "CnWizNotifier.pas" + 16) + $15
[13542A59]{mmx_bds20.dll} MMSuperHints.TMMSuperHintWindow.CalcHintRect (Line 113, "MMSuperHints.pas" + 1) + $10
[50ECE926]{vcl260.bpl  } Vcl.AppEvnts.TMultiCaster.DoShowHint (Line 600, "Vcl.AppEvnts.pas" + 9) + $3
[50E7050C]{vcl260.bpl  } Vcl.Forms.TApplication.ActivateHint (Line 11796, "Vcl.Forms.pas" + 46) + $18
[50E6FF3D]{vcl260.bpl  } Vcl.Forms.TApplication.HintTimerExpired (Line 11552, "Vcl.Forms.pas" + 8) + $4
[50E6C69A]{vcl260.bpl  } Vcl.Forms.HintTimerProc (Line 9191, "Vcl.Forms.pas" + 3) + $5
[50E6EC33]{vcl260.bpl  } Vcl.Forms.TApplication.ProcessMessage (Line 10747, "Vcl.Forms.pas" + 23) + $1
[50E6EC76]{vcl260.bpl  } Vcl.Forms.TApplication.HandleMessage (Line 10777, "Vcl.Forms.pas" + 1) + $4
[50E6EFA9]{vcl260.bpl  } Vcl.Forms.TApplication.Run (Line 10915, "Vcl.Forms.pas" + 26) + $3
[0051D022]{bds.exe     } bds.bds (Line 214, "" + 7) + $7

 

[fjames 0]

I also got this same behavior after upgrading >= v15.0.28. This made the indexer unusable for me. Once I downgraded back to v15.0.27 the indexer worked without AVs again.

[Uwe Raabe 2057]

2 hours ago, fjames said:

I also got this same behavior after upgrading >= v15.0.28. This made the indexer unusable for me. Once I downgraded back to v15.0.27 the indexer worked without AVs again.

Thanks! That is some real valuable information.

 

What pops out in the change log between these two versions is the update to a newer VirtualTrees version (7.0 -> 7.4). When I get some time I will try to reproduce that here and track down the cause.

[Uwe Raabe 2057]

Unfortunately I am not able to reproduce that here - neither with 10.3.3 nor with 10.4.1.

 

Can you reproduce it right from the start or has something to happen before?

[Uwe Raabe 2057]

I found a possible cause for the crash, but cannot figure out the condition to make it happen. Nevertheless I changed some code to be prepared for that case and have uploaded a new version. Can you please try if this solves the problem?

[Jacek Laskowski 57]

Now is okey, thanks! 🙂