Precompiled dll unlinking permission denied error on Windows 1.9.0-beta2

[jaakkor2]

On v"1.9.0-beta2" on Windows and using Revise, I see unlinking error if

• ]dev foo (generated by ]generate foo)
• using foo on one terminal, edit line greet() = print("Hello World!") to greet() = print("Hello World!!")
• on another terminal using foo

julia> using foo
[ Info: Precompiling foo [6e7b729e-b3bd-4efc-8e46-b379e954007d]
ERROR: IOError: unlink("C:\\Users\\jaakkor2\\.julia\\compiled\\v1.9\\foo\\ayvbZ_at0N3.dll"): permission denied (EACCES)
Stacktrace:
  [1] uv_error
    @ .\libuv.jl:100 [inlined]
  [2] unlink(p::String)
    @ Base.Filesystem .\file.jl:972
  [3] rm(path::String; force::Bool, recursive::Bool)
    @ Base.Filesystem .\file.jl:283
  [4] checkfor_mv_cp_cptree(src::String, dst::String, txt::String; force::Bool)
    @ Base.Filesystem .\file.jl:330
  [5] cp(src::String, dst::String; force::Bool, follow_symlinks::Bool)
    @ Base.Filesystem .\file.jl:378
  [6] rename(src::String, dst::String; force::Bool)
    @ Base.Filesystem .\file.jl:981
  [7] compilecache(pkg::Base.PkgId, path::String, internal_stderr::IO, internal_stdout::IO, keep_loaded_modules::Bool)
    @ Base .\loading.jl:2110
  [8] compilecache
    @ .\loading.jl:2016 [inlined]
  [9] _require(pkg::Base.PkgId, env::String)
    @ Base .\loading.jl:1660
 [10] _require_prelocked(uuidkey::Base.PkgId, env::String)
    @ Base .\loading.jl:1515
 [11] macro expansion
    @ .\loading.jl:1503 [inlined]
 [12] macro expansion
    @ .\lock.jl:267 [inlined]
 [13] require(into::Module, mod::Symbol)
    @ Base .\loading.jl:1466

[vchuravy]

We will need libuv/libuv#3839 to provide the right semantics on Windows.

The other alternative would be to detect this case and then swizzle the tail hash.