Division by zero

Was downloading a big file (100MB), quite slowly (150KB/s) because of the connection. This happened close to the end, or when it ended (I had checked the download by 90% aproximatelly then it went unsupervised).

WinSCP 5.7.5

Error message:
Division by zero

Stack trace:
(006487F3)
(007E39EA)
(007E5A52)
(007E29CC)
(0007C61F) ntdll.dll
(00069E6A) ntdll.dll.KiUserExceptionDispatcher
(0007812A)
(0070E6F5)
(006488CB)
(0064862C)
(00714965)
(007175B0)
(00722A99)
(0001C74F)
(0003F30B)
(003E869F)
(003E423E)
(003D9662)
(003FEF4F)
(0034021C)
(00033921) USER32.dll
(0001378B) USER32.dll
(0001308C) USER32.dll
(00012E4B) USER32.dll.DispatchMessageW

(007E4055)
(007E562F)
(00648720)
(0064862C)
(00714965)
(007175B0)
(00722A99)
(0001C74F)
(0003F30B)
(003E869F)
(003E423E)
(003D9662)
(003FEF4F)
(0034021C)
(00033921) USER32.dll
(0001378B) USER32.dll
(0001308C) USER32.dll
(00012E4B) USER32.dll.DispatchMessageW

(007E4055)
(007E562F)
(00714C7C)
(007175B0)
(00722A99)
(0001C74F)
(0003F30B)
(003E869F)
(003E423E)
(003D9662)
(003FEF4F)
(0034021C)
(00033921) USER32.dll
(0001378B) USER32.dll
(0001308C) USER32.dll
(00012E4B) USER32.dll.DispatchMessageW

Status: unknown_rel_addr

The problem happens rarely. I cannot reproduce it.