Tests fail with 1.6 dev

Am I the only one seeing this? The tests actually pass but fail at the end during the cleaning stage due to permission problems.

    Testing GMT
Status `C:\TMP\jl_Kq6FYF\Project.toml`
  [5752ebe1] GMT v0.25.0 `C:\Users\joaqu\.julia\dev\GMT`
  [ade2ca70] Dates
  [de0858da] Printf
  [8dfed614] Test
Status `C:\TMP\jl_Kq6FYF\Manifest.toml`
    Testing GMT tests passed
┌ Error: mktempdir cleanup
│   exception =
│    SystemError (with C:\TMP\jl_Kq6FYF): rmdir: Permission denied
│    Stacktrace:
│      [1] systemerror(p::Symbol, errno::Int32; extrainfo::String)
│        @ Base .\error.jl:168

What commit are you seeing this on?

I see the following:

    (GMT) pkg> test GMT
        Testing GMT
    Status `C:\cygwin\tmp\jl_SuHqTX\Project.toml`
    [5752ebe1] GMT v0.25.0
    [ade2ca70] Dates
    [de0858da] Printf
    [8dfed614] Test
    Status `C:\cygwin\tmp\jl_SuHqTX\Manifest.toml`
    [5752ebe1] GMT v0.25.0
    [2a0f44e3] Base64
    [ade2ca70] Dates
    [8ba89e20] Distributed
    [b77e0a4c] InteractiveUtils
    [56ddb016] Logging
    [d6f4376e] Markdown
    [de0858da] Printf
    [9a3f8284] Random
    [9e88b42a] Serialization
    [6462fe0b] Sockets
    [8dfed614] Test
    [4ec0a83e] Unicode
        Testing Running tests...


    You don't seem to have GMT installed and I don't currently install it automatically,
    so you will have to do it yourself. Please follow instructions bellow.
    1) Download and install the official version at (the '..._win64.exe':
                    https://github.com/GenericMappingTools/gmt/releases
    ┌ Warning: Assignment to `GG` in soft scope is ambiguous because a global variable by the same name exists: `GG` will be treated as a new local. Disambigua
    te by using `local GG` to suppress this warning or `global GG` to assign to the existing global variable.
    └ @ C:\Users\Administrator\.julia\packages\GMT\uSATO\test\runtests.jl:410
    ┌ Warning: Assignment to `G2` in soft scope is ambiguous because a global variable by the same name exists: `G2` will be treated as a new local. Disambigua
    te by using `local G2` to suppress this warning or `global G2` to assign to the existing global variable.
    └ @ C:\Users\Administrator\.julia\packages\GMT\uSATO\test\runtests.jl:470
    ┌ Warning: Assignment to `G2` in soft scope is ambiguous because a global variable by the same name exists: `G2` will be treated as a new local. Disambigua
    te by using `local G2` to suppress this warning or `global G2` to assign to the existing global variable.
    └ @ C:\Users\Administrator\.julia\packages\GMT\uSATO\test\runtests.jl:471
        Testing GMT tests passed

I haven’t installed the optional component yet, have you? Is there a simpler package that you’re seeing the same behavior on?

I just updated the dev version but have been seen this for a couple weeks now (before it worked)

julia> versioninfo()
Julia Version 1.6.0-DEV.1072
Commit fec672db85 (2020-09-29 06:02 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-10.0.1 (ORCJIT, skylake)

OK, tested CSV and it errored, but seems unrelated

   Testing Running tests...
CSV.File basics: Test Failed at C:\Users\joaqu\.julia\packages\CSV\MKemC\test\basics.jl:27
  Expression: CSV.File(joinpath(dir, "test_float_in_int_column.csv"); types = [Int, Int, Int], strict = true)
    Expected: CSV.Error
      Thrown: MethodError

but FFTW failed the same

Test Summary:           | Pass  Total
Base Julia issue #19892 |    3      3
    Testing FFTW tests passed
┌ Error: mktempdir cleanup
│   exception =
│    SystemError (with C:\TMP\jl_uXlJkf): rmdir: Permission denied