Invalid access to memory

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WinSCP 6.5.3

Error message:
Invalid access to memory.

Stack trace:
(001375EF)
(00EF5B8E)
(00EF7C06)
(00EF49B0)
(0000D1AE)ntdll.dll
(00043555)ntdll.dll
(000454FF)ntdll.dll
(0000D004)ntdll.dll
(004B1EDC)
(0012A131)
(000033BB)
(00EF38D1)
(0000D124)ntdll.dll
(000436E0)ntdll.dll

(FFFFEF7B)WinSCP.exe
(00EF5B8E)
(00EF7C06)
(00EF49B0)
(0000D1AE)ntdll.dll
(00043555)ntdll.dll
(000454FF)ntdll.dll
(0000D004)ntdll.dll
(0012A131)
(000033BB)
(00EF38D1)
(0000D124)ntdll.dll
(000436E0)ntdll.dll

Status: all_insignificant


happened on winscp running inside wine using virtual desktop mode.I am using wingui program

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.