Dotty: dotr crash under cygwin: "bash: /dev/tty: No such device or address"

[flomebul]

Unable to use dotr under cygwin.. see output below

$ dotr
Starting dotty REPL...
Welcome to Scala.next (pre-alpha, git-hash: 05aeeb5)  (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_121).
Type in expressions to have them evaluated.
Type :help for more information.
bash: /dev/tty: No such device or address
Exception in thread "main" java.lang.NullPointerException
        at dotty.tools.dotc.repl.ammonite.terminal.Terminal$.initialConfig$1(Terminal.scala:297)
        at dotty.tools.dotc.repl.ammonite.terminal.Terminal$.readLine(Terminal.scala:307)
        at dotty.tools.dotc.repl.AmmoniteReader.readLine(AmmoniteReader.scala:74)
        at dotty.tools.dotc.repl.InterpreterLoop.run(InterpreterLoop.scala:202)
        at dotty.tools.dotc.repl.REPL.doCompile(REPL.scala:43)
        at dotty.tools.dotc.Driver.process(Driver.scala:124)
        at dotty.tools.dotc.Driver.process(Driver.scala:93)
        at dotty.tools.dotc.Driver.process(Driver.scala:105)
        at dotty.tools.dotc.Driver.main(Driver.scala:132)
        at dotty.tools.dotc.repl.Main.main(Main.scala)

[liufengyun]

Thanks for reporting the bug @flomebul . We are now working on make Windows part of the CI, hope it will provide better experience with windows.

cc: @felixmulder Anmonite has some assumptions on bash?

compiler/src/dotty/tools/dotc/repl/ammonite/Utils.scala
83:    Seq("bash", "-c", s"$pathedTput $s 2> /dev/tty").!!.trim.toInt
103:    Seq("bash", "-c", s"$pathedStty $s < /dev/tty"): ProcessBuilder

[smarter]

Yeah, ammonite does not seem to work by default on Windows currently, but can work if you set some manually set some settings, see https://github.com/lihaoyi/Ammonite/issues/119#issuecomment-128209044, a later post in the issue describes what's missing for it to work automatically: https://github.com/lihaoyi/Ammonite/issues/119#issuecomment-234425033

[maseev]

I'm not sure if this is relevant, but I'm experiencing a very similar problem running the dotty REPL on Ubuntu:

[info] Running dotty.tools.repl.Main -classpath /home/maseev/projects/dotty/library/target/scala-2.12/dotty-library_2.12-0.5.0-bin-SNAPSHOT-nonbootstrapped.jar
bash: /dev/tty: No such device or address
bash: /dev/tty: No such device or address
Exception in thread "main" java.lang.RuntimeException: Nonzero exit value: 1
    at scala.sys.package$.error(package.scala:27)
    at scala.sys.process.ProcessBuilderImpl$AbstractBuilder.slurp(ProcessBuilderImpl.scala:134)
    at scala.sys.process.ProcessBuilderImpl$AbstractBuilder.$bang$bang(ProcessBuilderImpl.scala:104)
    at dotty.tools.repl.terminal.TTY$.stty(Utils.scala:106)
    at dotty.tools.repl.terminal.TTY$.init(Utils.scala:85)
    at dotty.tools.repl.terminal.Terminal$.x$7$lzycompute$1(Terminal.scala:302)
    at dotty.tools.repl.terminal.Terminal$.x$7$1(Terminal.scala:302)
    at dotty.tools.repl.terminal.Terminal$.initialConfig$lzycompute$1(Terminal.scala:302)
    at dotty.tools.repl.terminal.Terminal$.initialConfig$1(Terminal.scala:302)
    at dotty.tools.repl.terminal.Terminal$.readLine(Terminal.scala:313)
    at dotty.tools.repl.AmmoniteReader.prompt(AmmoniteReader.scala:125)
    at dotty.tools.repl.ReplDriver.readLine(ReplDriver.scala:182)
    at dotty.tools.repl.ReplDriver.runUntilQuit(ReplDriver.scala:133)
    at dotty.tools.repl.Main$.main(Main.scala:6)
    at dotty.tools.repl.Main.main(Main.scala)
java.lang.RuntimeException: Nonzero exit code returned from runner: 1
    at scala.sys.package$.error(package.scala:27)
[trace] Stack trace suppressed: run last dotty-compiler/compile:runMain for the full output.
[error] (dotty-compiler/compile:runMain) Nonzero exit code returned from runner: 1
[error] Total time: 46 s, completed Oct 27, 2017 5:47:10 PM
[IJ]> 

Linux 4.4.0-97-generic #120-Ubuntu SMP Tue Sep 19 17:28:18 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

[smarter]

We've since switched to JLine 3 for the REPL which should support Windows, please reopen if this issue is still present.