Invalid access to memory - TScpCommanderForm::LocalPathComboUpdateDrives

<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 5.8.4

Error message:
Invalid access to memory.

Stack trace:
(00046291) TScpCommanderForm::LocalPathComboUpdateDrives
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher

(00046291) TScpCommanderForm::LocalPathComboUpdateDrives
(00861DD6) C5073_3
(00863E3E) ____ExceptionHandler
(00860BF8) __ExceptionHandler
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher

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.

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 5.15.5

Error message:
Invalid access to memory.

Stack trace:
(00051967) TScpCommanderForm::LocalPathComboUpdateDrives
(0008402F) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(000521F1) TScpCommanderForm::LocalDriveViewRefreshDrives
(003A3E44) System::Classes::_18201
(00044E39) USER32.dll
(000359D7) USER32.dll
(00034B16) USER32.dll
(000348EB) 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 5.15.5

Error message:
Invalid access to memory.

Stack trace:
(00051967) TScpCommanderForm::LocalPathComboUpdateDrives
(0008402F) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(000521F1) TScpCommanderForm::LocalDriveViewRefreshDrives
(003A3E44) System::Classes::_18201
(00044E39) USER32.dll
(000359D7) USER32.dll
(00034B16) USER32.dll
(000348EB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.