`pkgdir(@__MODULE__)` returns `nothing` during `__init__` on 1.11.0

[SBuercklin]

On Julia 1.11.0, generating a new package whose src/MWE.jl is just the following, where we print the pkgdir for the current @__MODULE__:

module MWE

greet() = print("Hello World!")

function __init__()
    println(@__MODULE__)
    println(pkgdir(@__MODULE__))
end

end # module MWE

produces the following when being loaded (note the nothing for pkgdir):

julia> using MWE
[ Info: Precompiling MWE [07383931-b36a-4268-bd90-eec35e6fd057]
MWE
nothing

However, on Julia 1.10.5, the proper directory is printed:

julia> using MWE
  No Changes to `/tmp/tmp.s4wO5AcljZ/MWE/Project.toml`
  No Changes to `/tmp/tmp.s4wO5AcljZ/MWE/Manifest.toml`
Precompiling MWE
  1 dependency successfully precompiled in 1 seconds
MWE
/tmp/tmp.s4wO5AcljZ/MWE

[fatteneder]

Appears on 1.11.0-rc2 but not on 1.11.0-rc1, currently bisecting commits.

[fatteneder]

Bisected to 19f838f/#54739

[thchr]

Just noting here that this is very likely responsible for JuliaIO/JLD2.jl#610, which makes it impossible to JLD2-load variables in __init__ whose types are defined in the package itself.

[IanButterworth]

Can we see if this is fixed on nightly. It might be that we need to backport something. There's been a lot of loading tweaks on master.

[fatteneder]

I tried yesterday using nightly but it was still not working.

[IanButterworth]

@vtjnash I'm guessing pkgorigins is set after the inits have run?

[IanButterworth]

@fatteneder I just tried this on nightly 4c076c8 and it worked?

The active project was the MWE package, and there's no Manifest so the old serial precompile path is used.

julia> using MWE
[ Info: Precompiling MWE [07383931-b36a-4268-bd90-eec35e6fd057]
MWE
/Users/ian/Documents/GitHub/mwe

[fatteneder]

Its now working too. I might have forgotten to update the nightly channel before testing. Sorry.

[IanButterworth]

Any idea which commit you were on?

[fatteneder]

I fear not, because I just updated it since juliaup showed that its outdated ...

[fatteneder]

Ok, I have two .ji caches which contain these commits:

• b049f93, July 17th
• 7d81897, Nov 1st

So I guess I was still on the first one...