parsefile: Windows unlink permission denied

[AnHeuermann]

Description

On Windows I get an IOError when deleting a JSON file I previously parsed with JSON.parsefile.
Similar to #64 calling gc() solves the issue for me.

On Linux I have no such problems.

How to reproduce

using JSON

jsonFile = "test.json"
open(jsonFile, "w") do io
  write(io,
  """
  {
    "Hello": "World!"
  }
  """)
end;

infoFile = JSON.parsefile(jsonFile)
#GC.gc()    # <-- Solves issue

rm(jsonFile)
@info "Success"

ERROR: IOError: unlink("test.json"): permission denied (EACCES)     
Stacktrace:
 [1] uv_error
   @ .\libuv.jl:97 [inlined]
 [2] unlink(p::String)
   @ Base.Filesystem .\file.jl:958
 [3] rm(path::String; force::Bool, recursive::Bool)
   @ Base.Filesystem .\file.jl:276
 [4] rm(path::String)
   @ Base.Filesystem .\file.jl:267
 [5] top-level scope
   @ path\to\bug.jl:17

Versions

• JSON.jl: [682c06a0] JSON v0.21.3
• Julia Version 1.7.1
  Commit ac5cc99908 (2021-12-22 19:35 UTC)
  Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i7-10700KF CPU @ 3.80GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-12.0.1 (ORCJIT, skylake)
  Environment:
  JULIA_CUDA_USE_BINARYBUILDER = false
  JULIA_EDITOR = code
  JULIA_NUM_THREADS =
• OS: Windows 10

[odow]

Almost certainly a duplicate of #112

The workaround is to use JSON.parsefile(filename; use_mmap = false).