2.12.0-RC1 REPL :setting and :replay broken?

[Jasper-M]

Please see the following REPL transcript.

The problems seem to be:

  1. the -feature flag is not set

  2. after :replay the REPL seems to be broken; typed text no longer appears in the prompt, can't scroll through history with arrows, can't exit with Ctrl+D.

Welcome to Scala 2.12.0-RC1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_101).

Type in expressions for evaluation. Or try :help.

scala> trait Foo {

     |   def foo[C[A] <: Traversable[A]](c: C[String])

     | }

warning: there was one feature warning; for details, enable `:setting -feature' or `:replay -feature'

defined trait Foo

scala> :setting -feature

scala> trait Foo {

     |   def foo[C[A] <: Traversable[A]](c: C[String])

     | }

warning: there was one feature warning; for details, enable `:setting -feature' or `:replay -feature'

defined trait Foo

scala> :replay -feature

Replaying: trait Foo {

  def foo[C[A] <: Traversable[A]](c: C[String])

}

warning: there was one feature warning; for details, enable `:setting -feature' or `:replay -feature'

defined trait Foo

Replaying: trait Foo {

  def foo[C[A] <: Traversable[A]](c: C[String])

}

warning: there was one feature warning; for details, enable `:setting -feature' or `:replay -feature'

defined trait Foo

scala> 

scala> <console>:12: error: not found: value foo

       foo

       ^

scala> <console>:1: error: illegal character '\u0004'

\u0004\u0004\u0004\u0004\u0004

^

<console>:1: error: illegal character '\u0004'

\u0004\u0004\u0004\u0004\u0004

 ^

<console>:1: error: illegal character '\u0004'

\u0004\u0004\u0004\u0004\u0004

  ^

<console>:1: error: illegal character '\u0004'

\u0004\u0004\u0004\u0004\u0004

   ^

<console>:1: error: illegal character '\u0004'

\u0004\u0004\u0004\u0004\u0004

    ^

scala> 

[Jasper-M]

I get the same results in scala 2.11.8, by the way. Only then those features weren't promoted by the warnings.

Op vrijdag 30 september 2016 15:45:48 UTC+2 schreef Jasper-M:

[som-snytt]

This works for me. If -feature -deprecation are both not set by user, both are on for REPL in 2.12. SI-8829

Is there an interaction with sbt or something else?

$ scalam
Welcome to Scala 2.12.0-RC1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_92).

Type in expressions for evaluation. Or try :help.

scala> trait F { def f[C[A] <: Traversable[A]](c: C[String]) }
<console>:11: warning: higher-kinded type should be enabled
by making the implicit value scala.language.higherKinds visible.
This can be achieved by adding the import clause 'import scala.language.higherKinds'
or by setting the compiler option -language:higherKinds.
See the Scaladoc for value scala.language.higherKinds for a discussion
why the feature should be explicitly enabled.
       trait F { def f[C[A] <: Traversable[A]](c: C[String]) }
                       ^
defined trait F

scala> :replay -language:higherKinds
Replaying: trait F { def f[C[A] <: Traversable[A]](c: C[String]) }
defined trait F

[Jasper-M]

I have tried it with sbt 0.13.6 and 0.13.12, in an empty project with only `scalaVersion := "2.12.0-RC1"` in the build.sbt. I go to the REPL with either `console` or `consoleQuick`. All the same result as my first mail.

I am on Ubuntu 14.04. In ~/.sbt/0.13/plugins/plugins.sbt I have `addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "4.0.0")`. That's all I know.

Op donderdag 6 oktober 2016 18:18:07 UTC+2 schreef som-snytt:

[som-snytt]

Thanks, I do see the symptom under sbt.

I'll open a ticket somewhere. Though the readme for sbt says, Don't open an Issue.