UnRAR.dll/UnRAR64.dll v7.00b1 isn't compatible with TC11

[jiangzhenjerry]

This issue is similar to my earlier report (which has been fixed).

Basically, I use UnRAR64.dll v7.00b1 (can be found here) to replace the bundled file (v6.24) in TC. Turns out it doesn't work. Whenever I click into an .rar file, TC quits.

I don't know if it's a future compatibility issue or a WinRAR bug... Any insights would be helpful and appreciated.

[Horst.Epp]

I have replaced all unrar*.* files with the new 7.0.1 versions from
https://www.rarlab.com/rar_add.htm
TC X64 works fine with them.
32bit TC doesn't work.
But we are talking about beta versions of WinRAR !

[ghisler(Author)]

I can confirm that the DLL crashes within a call to RARReadHeaderEx, it tries to write to address 0x0000000D.
I will contact the RAR author.

[ghisler(Author)]

I was able to find the reason with some help from the RAR author: He added new fields to the end of the structure passed to RARReadHeaderEx which Total Commander wasn't initializing to zero by mistake. Therefore the dll tried to write to a non-existant buffer. I will support the new dll in TC11.02, but unfortunately this means that it will never work in older versions, sorry.

[ghisler(Author)]

This should be fixed in RC5, please test!

26.10.23 Fixed: Unrar.dll 7.0 beta was crashing when called from Total Commander (because it was using uninitialized fields in RARHeaderDataEx) (32/64)

[jiangzhenjerry]

Confirmed fixed in RC5. Thank you very much! Actually WinRAR has also fixed it on their end. Their latest build (same link but digitally signed on 10/30) can work even with TC11 RC4 too.

[Horst.Epp]

Fix confirmed.

[ghisler(Author)]

Actually WinRAR has also fixed it on their end.

That's great, I didn't expect that they would add a workaround to a bug in TC...