Merge pull request JuliaLang/julia#44789 from JuliaLang/backports-rel…

…ease-1.8

Backports for 1.8-rc1

src/cluster.jl

@@ -232,7 +232,10 @@ start_worker(cookie::AbstractString=readline(stdin); kwargs...) = start_worker(s
 function start_worker(out::IO, cookie::AbstractString=readline(stdin); close_stdin::Bool=true, stderr_to_stdout::Bool=true)
     init_multi()
 
-    close_stdin && close(stdin) # workers will not use it
+    if close_stdin # workers will not use it
+        redirect_stdin(devnull)
+        close(stdin)
+    end
     stderr_to_stdout && redirect_stderr(stdout)
 
     init_worker(cookie)

test/distributed_exec.jl

@@ -1616,7 +1616,11 @@ cluster_cookie("")
 for close_stdin in (true, false), stderr_to_stdout in (true, false)
     local npids = addprocs_with_testenv(RetainStdioTester(close_stdin,stderr_to_stdout))
     @test remotecall_fetch(myid, npids[1]) == npids[1]
-    @test close_stdin != remotecall_fetch(()->isopen(stdin), npids[1])
+    if close_stdin
+        @test remotecall_fetch(()->stdin === devnull && !isreadable(stdin), npids[1])
+    else
+        @test remotecall_fetch(()->stdin !== devnull && isopen(stdin) && isreadable(stdin), npids[1])
+    end
     @test stderr_to_stdout == remotecall_fetch(()->(stderr === stdout), npids[1])
     rmprocs(npids)
 end