reading output from readandwrite freezes on Windows

[tkelman]

test/repl.jl was added in #6955, most of the file is @unix_only at the moment except a few lines at the very end. These lines are freezing for me on Windows, but they're using process commands that you'd think should work.

  | | |_| | | | (_| |  |  Version 0.3.0-prerelease+3381 (2014-06-02 13:19 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit ddf4197* (0 days old master)
|__/                   |  x86_64-w64-mingw32

julia> exename = joinpath(JULIA_HOME, "julia")
"D:\\code\\msys64\\home\\Tony\\julia\\usr\\bin\\julia"

julia> outs, ins, p = readandwrite(`$exename -f --quiet`)
(Pipe(active, 0 bytes waiting),Pipe(open, 0 bytes waiting),Process(`'D:\code\msy
s64\home\Tony\julia\usr\bin\julia' -f --quiet`, ProcessRunning))

julia> write(ins,"1\nquit()\n")
9

julia> ins
Pipe(open, 0 bytes waiting)

julia> outs
Pipe(active, 2 bytes waiting)

julia> readall(outs)

This last command never exits, I have to manually kill the julia process(es).

---

exename = joinpath(JULIA_HOME, "julia")
outs, ins, p = readandwrite(`$exename -f --quiet`)
write(ins,"1\nquit()\n")
readall(outs)

[vtjnash]

It should work, but the julia repl subprocess is waiting to read one more character before it dies. @Keno

[tkelman]

So any chance of fixing #7174 for the release, or do we @unix_only this test for 0.3.0?

[vtjnash]

It's on the list for 0.3, if someone has any idea how to patch it. This seems an especially hard windows bug to work around well