Switch order of DL_LOAD_PATH tests

...so that the test using the absolute path can be run unconditionally.

stdlib/Libdl/test/runtests.jl

@@ -224,11 +224,6 @@ end
 
 # test DL_LOAD_PATH handling and @executable_path expansion
 mktempdir() do dir
- # Skip these tests if the temporary directory is not on the same filesystem
- # as the BINDIR, as in that case, a relative path will never work.
- if Base.Filesystem.splitdrive(dir)[1] != Base.Filesystem.splitdrive(Sys.BINDIR)[1]
- return
- end
  # Create a `libdcalltest` in a directory that is not on our load path
  src_path = joinpath(private_libdir, "libccalltest.$(Libdl.dlext)")
  dst_path = joinpath(dir, "libdcalltest.$(Libdl.dlext)")
@@ -237,8 +232,8 @@ mktempdir() do dir
  # Add an absurdly long entry to the load path to verify it doesn't lead to a buffer overflow
  push!(Base.DL_LOAD_PATH, joinpath(dir, join(rand('a':'z', 10000))))
 
- # Add this temporary directory to our load path, using `@executable_path` to do so.
- push!(Base.DL_LOAD_PATH, joinpath("@executable_path", relpath(dir, Sys.BINDIR)))
+ # Add the temporary directors to load path by absolute path
+ push!(Base.DL_LOAD_PATH, dir)
 
  # Test that we can now open that file
  Libdl.dlopen("libdcalltest") do dl
@@ -252,10 +247,17 @@ mktempdir() do dir
  @test fptr == C_NULL
  end
 
- # Now use the absolute path
+ # Skip these tests if the temporary directory is not on the same filesystem
+ # as the BINDIR, as in that case, a relative path will never work.
+ if Base.Filesystem.splitdrive(dir)[1] != Base.Filesystem.splitdrive(Sys.BINDIR)[1]
+ return
+ end
+
  empty!(Base.DL_LOAD_PATH)
  push!(Base.DL_LOAD_PATH, joinpath(dir, join(rand('a':'z', 10000))))
- push!(Base.DL_LOAD_PATH, dir)
+
+ # Add this temporary directory to our load path, now using `@executable_path` to do so.
+ push!(Base.DL_LOAD_PATH, joinpath("@executable_path", relpath(dir, Sys.BINDIR)))
 
  # Test that we can now open that file
  Libdl.dlopen("libdcalltest") do dl