Privileged instruction - __tpdsc__ System::Generics::Defaults::IComparer__1<int>

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WinSCP 6.1

Error message:
Privileged instruction

Stack trace:
(0022E8E0) __tpdsc__ System::Generics::Defaults::IComparer__1<int>
(01004C0A) C6085_3
(01006C72) ____ExceptionHandler
(01003A2C) __ExceptionHandler
(00087AEF) ntdll.dll
(00073FB1) ntdll.dll.KiUserExceptionDispatcher
(00D1DC43) TTerminalQueue::GetIsEmpty
(0000A097) TCustomScpExplorerForm::AddQueueItem
(00017825) TCustomScpExplorerForm::ExecutedFileChanged
(00080499) TEditorManager::CheckFileChange
(0007DE86) TEditorManager::Check
(0001B88D) TCustomScpExplorerForm::Idle
(00053237) TNonVisualDataModule::DoIdle
(000531F4) TNonVisualDataModule::SessionIdleTimerTimer
(00214D34) System::Classes::_18201
(00040379) USER32.dll
(00037345) USER32.dll
(000350B5) USER32.dll
(00034E7B) USER32.dll.DispatchMessageW

(01005275) C6085_3
(0100684F) _ReThrowException
(000804D9) TEditorManager::CheckFileChange
(0007DE86) TEditorManager::Check
(0001B88D) TCustomScpExplorerForm::Idle
(00053237) TNonVisualDataModule::DoIdle
(000531F4) TNonVisualDataModule::SessionIdleTimerTimer
(00214D34) System::Classes::_18201
(00040379) USER32.dll
(00037345) USER32.dll
(000350B5) USER32.dll
(00034E7B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.