auto_unbox error due to Uint8 deprecation

[timholy]

Mentioned in 1b6efc7 and #13107 (comment), but since there's no issue open:

julia> function bar(lib)
           soname = ccall(:jl_lookup_soname, Ptr{Uint8}, (Ptr{Uint8}, Csize_t), lib, sizeof(lib))
           if soname != C_NULL
               println("not null")
           else
               println("null")
           end
       end
bar (generic function with 1 method)

julia> bar("libfoo")
WARNING: Base.Uint8 is deprecated, use UInt8 instead.
in bar at none:2
WARNING: Base.Uint8 is deprecated, use UInt8 instead.
WARNING: Base.Uint8 is deprecated, use UInt8 instead.
WARNING: Base.Uint8 is deprecated, use UInt8 instead.
in bar at none:2
ERROR: auto_unbox: unable to determine argument type
 in bar at none:3

but it works fine if you use the uppercase UInt8 instead.

[timholy]

This is quite breaking, so I added the tag.

[yuyichao]

Isn't this already fixed by #13180 ?

[yuyichao]

IIUC Tony have already confirmed with PkgEval that the fixed the issue so I'm going to close this. Feel free to reopen if it is still a problem.

[timholy]

Not in release-0.4 yet. I can't keep up with all the email, so I'll just ask: already slated, or does something more need to be done?

[mbauman]

It's due to be merged in #13182

[yuyichao]

It should work on master already and I think it's in Tony's latest queue of 0.4 backport.

Edit: Yeah that one ^^^