Invalid access to memory - System::FillChar

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(002A5AE3) System::FillChar
(00E2235E) C6610_3
(00E243C6) ____ExceptionHandler
(00E21180) __ExceptionHandler
(00087A6F) ntdll.dll
(000740C1) ntdll.dll.KiUserExceptionDispatcher
(0054371F) Vcl::Imaging::Pngimage::TChunkIHDR::Assign

(00E229C9) C6610_3
(00E23FA3) _ReThrowException
(000C26B8) TTerminalManager::ReconnectActiveTerminal
(000D3A68) ShowExtendedExceptionEx
(00025DA8) TCustomScpExplorerForm::ShowExtendedException
(000C3E41) TTerminalManager::TerminalShowExtendedException
(00C6137C) TTerminal::ShowExtendedException
(003CD426) Vcl::Forms::TApplication::HandleException
(002271BC) System::Classes::_18201
(00040779) USER32.dll
(00036B65) USER32.dll
(0003549C) USER32.dll
(00034FBB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Error reading SessionImageList.PngImages: The parameter is incorrect.


Stack trace:
(002A5AE3) System::FillChar
(00087A6F) ntdll.dll
(000740C1) ntdll.dll.KiUserExceptionDispatcher
(0054397D) Vcl::Imaging::Pngimage::TChunkIHDR::LoadFromStream
(00547D88) Vcl::Imaging::Pngimage::TPngImage::LoadFromStream
(003AD92A) Vcl::Graphics::TGraphic::ReadData
(003AD6F8) Vcl::Graphics::TGraphic::DefineProperties
(00217D07) System::Classes::TReader::ReadProperty
(00216E05) System::Classes::TReader::ReadCollection
(002181BB) System::Classes::TReader::ReadPropValue
(00217CEE) System::Classes::TReader::ReadProperty
(00217541) System::Classes::TReader::ReadDataInner
(00217523) System::Classes::TReader::ReadData
(0022519D) System::Classes::TComponent::ReadState
(002175B5) System::Classes::TReader::ReadDataInner
(002174F4) System::Classes::TReader::ReadData
(0022519D) System::Classes::TComponent::ReadState
(003C2981) Vcl::Forms::TCustomForm::ReadState
(00CE0B00) TLoginDialog::ReadState
(0021239A) System::Classes::TStream::ReadComponent
(00207DDF) System::Classes::_17089
(00209733) System::Classes::_17116
(002097C1) System::Classes::InitInheritedComponent
(003C217A) Vcl::Forms::TCustomForm::TCustomForm
(00005912) Vcl::Forms::TForm::TForm
(00CD5B0E) TLoginDialog::TLoginDialog
(00476838) Pastools::Construct
(00113437) GetLoginData
(000C5C99) TTerminalManager::NewSession
(00024688) TCustomScpExplorerForm::NeedSession
(0005996B) TScpCommanderForm::NeedSession
(00024600) TCustomScpExplorerForm::LastTerminalClosed
(000C2938) TTerminalManager::FreeTerminal
(000C1C07) TTerminalManager::FreeActiveTerminal
(00AE74D2) TThemePageControl::Dispatch
(00409495) Vcl::Controls::TWinControl::WndProc
(00408ADC) Vcl::Controls::TWinControl::MainWndProc
(002271BC) System::Classes::_18201
(00040779) USER32.dll
(00036B65) USER32.dll
(00036321) USER32.dll.GetSystemMetricsForDpi
(00034B16) USER32.dll.CallWindowProcW
(004C32DF) Dragdrop::TDragDrop::WndMethod
(002271BC) System::Classes::_18201
(00040779) USER32.dll
(00036B65) USER32.dll
(0003549C) USER32.dll
(00034FBB) USER32.dll.DispatchMessageW

(002A5AE3) System::FillChar

(00217B13) System::Classes::_17687
(00217D4D) System::Classes::TReader::ReadProperty
(00216E05) System::Classes::TReader::ReadCollection
(002181BB) System::Classes::TReader::ReadPropValue
(00217CEE) System::Classes::TReader::ReadProperty
(00217541) System::Classes::TReader::ReadDataInner
(00217523) System::Classes::TReader::ReadData
(0022519D) System::Classes::TComponent::ReadState
(002175B5) System::Classes::TReader::ReadDataInner
(002174F4) System::Classes::TReader::ReadData
(0022519D) System::Classes::TComponent::ReadState
(003C2981) Vcl::Forms::TCustomForm::ReadState
(00CE0B00) TLoginDialog::ReadState
(0021239A) System::Classes::TStream::ReadComponent

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.1

Error message:
无效的内存访问。

Stack trace:
(002A5087) System::FillChar
(00E21986) C6608_0
(00E239EE) ____ExceptionHandler
(00E207A8) __ExceptionHandler
(00087A6F) ntdll.dll
(000740C1) ntdll.dll.KiUserExceptionDispatcher
(00542C97) Vcl::Imaging::Pngimage::TChunkIHDR::Assign

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.

@li364523467: 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.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.2

Error message:
Invalid access to memory.

Stack trace:
(002A58AF) System::FillChar
(0009823F) ntdll.dll
(00077E51) ntdll.dll.KiUserExceptionDispatcher
(005434EB) Vcl::Imaging::Pngimage::TChunkIHDR::Assign

(002A58AF) System::FillChar
(0009823F) ntdll.dll
(00077E51) ntdll.dll.KiUserExceptionDispatcher
(005434EB) Vcl::Imaging::Pngimage::TChunkIHDR::Assign

The problem happens rarely. I cannot reproduce it.