Invalid access to memory - TCustomScpExplorerForm::ExecutedFileChanged

<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 6.1

Error message:
Invalid access to memory.

Stack trace:
(00016DB2) TCustomScpExplorerForm::ExecutedFileChanged
(01004C0A) C6085_3
(01006C72) ____ExceptionHandler
(01003A2C) __ExceptionHandler
(000974CF) ntdll.dll
(00077751) ntdll.dll.KiUserExceptionDispatcher
(00080499) TEditorManager::CheckFileChange
(0007E162) TEditorManager::FileChanged
(00E4C833) TEditorForm::SaveFile
(00E4C8B0) TEditorForm::EditorActionsExecute
(00346749) Vcl::Actnlist::TCustomAction::Execute
(00214D34) System::Classes::_18201
(000313A1) USER32.dll
(000220B1) USER32.dll
(00020970) USER32.dll
(000204BB) USER32.dll.DispatchMessageW

(01005275) C6085_3
(0100684F) _ReThrowException
(000804D9) TEditorManager::CheckFileChange
(0007E162) TEditorManager::FileChanged
(00E4C833) TEditorForm::SaveFile
(00E4C8B0) TEditorForm::EditorActionsExecute
(00346749) Vcl::Actnlist::TCustomAction::Execute
(00214D34) System::Classes::_18201
(000313A1) USER32.dll
(000220B1) USER32.dll
(00020970) USER32.dll
(000204BB) 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 6.1.1

Error message:
Invalid access to memory.

Stack trace:
(00016DE2) TCustomScpExplorerForm::ExecutedFileChanged
(0100350E) C6083_0
(01005576) ____ExceptionHandler
(01002330) __ExceptionHandler
(0009783F) ntdll.dll
(000777B1) ntdll.dll.KiUserExceptionDispatcher
(000804C9) TEditorManager::CheckFileChange
(0007E192) TEditorManager::FileChanged
(00E4B137) TEditorForm::SaveFile
(00E4B1B4) TEditorForm::EditorActionsExecute
(003467AD) Vcl::Actnlist::TCustomAction::Execute
(00214D98) System::Classes::_18201
(00031941) USER32.dll
(00022731) USER32.dll
(00020FF0) USER32.dll
(00020B3B) USER32.dll.DispatchMessageW

(01003B79) C6083_0
(01005153) _ReThrowException
(00080509) TEditorManager::CheckFileChange
(0007E192) TEditorManager::FileChanged
(00E4B137) TEditorForm::SaveFile
(00E4B1B4) TEditorForm::EditorActionsExecute
(003467AD) Vcl::Actnlist::TCustomAction::Execute
(00214D98) System::Classes::_18201
(00031941) USER32.dll
(00022731) USER32.dll
(00020FF0) USER32.dll
(00020B3B) 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 6.1.1

Error message:
Invalid access to memory.

Stack trace:
(00016DE2) TCustomScpExplorerForm::ExecutedFileChanged
(0100350E) C6083_0
(01005576) ____ExceptionHandler
(01002330) __ExceptionHandler
(00087A7F) ntdll.dll
(000740D1) ntdll.dll.KiUserExceptionDispatcher
(000804C9) TEditorManager::CheckFileChange
(0007E192) TEditorManager::FileChanged
(00E4B137) TEditorForm::SaveFile
(00E4B1B4) TEditorForm::EditorActionsExecute
(003467AD) Vcl::Actnlist::TCustomAction::Execute
(003B4BC1) Vcl::Forms::TCustomForm::CloseQuery
(003F62DD) Vcl::Controls::TWinControl::WndProc
(003B07EC) Vcl::Forms::TCustomForm::WndProc

(01003B79) C6083_0
(01005153) _ReThrowException
(00080509) TEditorManager::CheckFileChange
(0007E192) TEditorManager::FileChanged
(00E4B137) TEditorForm::SaveFile
(00E4B1B4) TEditorForm::EditorActionsExecute
(003467AD) Vcl::Actnlist::TCustomAction::Execute
(003B4BC1) Vcl::Forms::TCustomForm::CloseQuery
(003F62DD) Vcl::Controls::TWinControl::WndProc
(003B07EC) Vcl::Forms::TCustomForm::WndProc

The problem happens rarely. I cannot reproduce it.