Accès mémoire invalide - _ssh_conn_processed_data

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WinSCP 6.5

Error message:
Accès mémoire invalide.

Trace de la pile :
(00B74789) C4406_0
(00EF4C46)
(00EF6CBE)
(00EF3A68) __ExceptionHandler
(000990CF) ntdll.dll
(000783C1) ntdll.dll.KiUserExceptionDispatcher
(00B88AF0) _ssh_conn_processed_data
(00B895B4) _ssh_is_bare
(00C99910) TSecureShell::FreeBackend
(00C93FAC) TSecureShell::Open
(00CEF585) TSFTPFileSystem::Open
(00D323CB) TTerminal::Reopen
(00C48A89) TTerminalThread::TerminalReopenEvent
(00C437F8) TSignalThread::Execute
(000DF43B) Userinterface::C20_0
(00016BA7) KERNEL32.DLL.BaseThreadInitThunk
(0006B2E9) ntdll.dll
(0006B26A) ntdll.dll

(00EF52B1)
(00EF688B)
(00D302FA) TTerminal::Open
(00D323CB) TTerminal::Reopen
(00C48A89) TTerminalThread::TerminalReopenEvent
(00C437F8) TSignalThread::Execute
(000DF43B) Userinterface::C20_0
(00016BA7) KERNEL32.DLL.BaseThreadInitThunk
(0006B2E9) ntdll.dll
(0006B26A) ntdll.dll

The problem happens rarely. I cannot reproduce it.