what's this Error: corrupt MS Coff object module

[mw]

On Tuesday, 25 August 2020 at 01:13:11 UTC, Adam D. Ruppe wrote:
> On Tuesday, 25 August 2020 at 01:08:49 UTC, mw wrote:
>> Is it safe to just delete all the:
>
> yup. I have to do this every other week on my work box to keep 
> its hard drive from filling up lol

I just completely deleted that `packages` dir, and the 
<proj_dir>/.dub dir and also the app.sln file; then I start from 
scratch:

dub.exe generate visuald

But I got the exact same build error: corrupt MS Coff object.

I think it's showhow caused by the build process itself, maybe 
just inside the unit-threaded-1.0.4 package, any suggestions 
where to check further?

Thanks.