Invalid access to memory - TCustomScpExplorerForm::GetSessionTabSession

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WinSCP 6.5.7

Error message:
Invalid access to memory.

Stack trace:
(00025818) TCustomScpExplorerForm::GetSessionTabSession
(0000D4FE)ntdll.dll
(0004EFDB)ntdll.dll
(00051578)ntdll.dll
(0000D354)ntdll.dll
(00025AA4) TCustomScpExplorerForm::SessionsPageControlChange
(00402209) Vcl::Comctrls::TCustomTabControl::Change
(003A356D) Vcl::Controls::TWinControl::WndProc
(0039DFF8) Vcl::Controls::TControl::Perform
(003A36C7) Vcl::Controls::_17122
(0039E3C2) Vcl::Controls::TControl::WndProc
(003A356D) Vcl::Controls::TWinControl::WndProc
(004A77B4) Vcl::Forms::TCustomForm::WndProc
(00E0808B) Vclcommon::C4886_0
(003A2A78) Vcl::Controls::TWinControl::MainWndProc
(00204C90) System::Classes::_18364
(00009646) user32.dll.GetWindowLongA
(000616D2) user32.dll
(000677F5) user32.dll
(00053313) user32.dll
(00051A5E)ntdll.dll
(000111CA)ntdll.dll
(00010BE6) win32u.dll.NtUserMessageCall
(0008522A) comctl32.dll
(00086519) comctl32.dll
(00009646) user32.dll.GetWindowLongA
(000616D2) user32.dll
(000677F5) user32.dll
(0000F9BF) user32.dll.CallWindowProcW
(003A3675) Vcl::Controls::TWinControl::DefaultHandler
(003A356D) Vcl::Controls::TWinControl::WndProc
(003A2A78) Vcl::Controls::TWinControl::MainWndProc
(00204C90) System::Classes::_18364
(00009646) user32.dll.GetWindowLongA
(000616D2) user32.dll
(000677F5) user32.dll
(0000F9BF) user32.dll.CallWindowProcW
(00539473) Dragdrop::TDragDrop::WndMethod
(00204C90) System::Classes::_18364
(00009646) user32.dll.GetWindowLongA
(000616D2) user32.dll
(000677F5) user32.dll
(00053313) user32.dll
(00051A5E)ntdll.dll
(000111CA)ntdll.dll
(00010BE6) win32u.dll.NtUserMessageCall
(0016B30F) Winapi::Messages::SendStructMessage
(00401F18) Vcl::Comctrls::_16758
(001EE49F) System::Classes::TStrings::InsertObject
(00404117) Vcl::Comctrls::TPageControl::InsertTab
(00403682) Vcl::Comctrls::TTabSheet::SetTabShowing
(000CE989) TTerminalManager::DoSessionListChanged
(000CA28F) TTerminalManager::NewLocalSession
(0005B7D8) TScpCommanderForm::DoShow
(004ABCD1) Vcl::Forms::TCustomForm::CMShowingChanged
(0002D83D) TCustomScpExplorerForm::CMShowingChanged
(0002D5A0) TCustomScpExplorerForm::Dispatch
(0039E3C2) Vcl::Controls::TControl::WndProc
(003A356D) Vcl::Controls::TWinControl::WndProc
(004A77B4) Vcl::Forms::TCustomForm::WndProc
(00E07E04) Vclcommon::C4886_0
(00E07FC6) Vclcommon::C4886_0
(0039DFF8) Vcl::Controls::TControl::Perform
(003A2819) Vcl::Controls::TWinControl::UpdateShowing
(003A292E) Vcl::Controls::TWinControl::UpdateControlState
(003A56F2) Vcl::Controls::TWinControl::CMVisibleChanged
(0039E3C2) Vcl::Controls::TControl::WndProc
(003A356D) Vcl::Controls::TWinControl::WndProc
(004A77B4) Vcl::Forms::TCustomForm::WndProc
(00E0808B) Vclcommon::C4886_0
(0039DFF8) Vcl::Controls::TControl::Perform
(0039CA26) Vcl::Controls::TControl::SetVisible
(0012A249) Execute
(000033BB) wWi

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

@kavitama: Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.